cr310 yacht

Review of CR 310

Basic specs..

The boat is typically equipped with an engine.

Sailing characteristics

This section covers widely used rules of thumb to describe the sailing characteristics. Please note that even though the calculations are correct, the interpretation of the results might not be valid for extreme boats.

What is Capsize Screening Formula (CSF)?

The capsize screening value for CR 310 is 1.87, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 6.7 knots. The term "Theoretical Maximum Hull Speed" is widely used even though a boat can sail faster. The term shall be interpreted as above the theoretical speed a great additional power is necessary for a small gain in speed.

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for CR 310 is about 153 kg/cm, alternatively 857 lbs/inch. Meaning: if you load 153 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 857 lbs cargo on the boat it will sink 1 inch.

Sailing statistics

This section is statistical comparison with similar boats of the same category. The basis of the following statistical computations is our unique database with more than 26,000 different boat types and 350,000 data points.

What is Motion Comfort Ratio (MCR)?

What is L/B (Length Beam Ratio)?

What is Displacement Length Ratio?

Maintenance

If you need to renew parts of your running rig and is not quite sure of the dimensions, you may find the estimates computed below useful.

This section shown boat owner's changes, improvements, etc. Here you might find inspiration for your boat.

Do you have changes/improvements you would like to share? Upload a photo and describe what to look for.

We are always looking for new photos. If you can contribute with photos for CR 310 it would be a great help.

If you have any comments to the review, improvement suggestions, or the like, feel free to contact us . Criticism helps us to improve.

CR310 Measurement and Control Datalogger

• Similar Products
• Detailed Description

Specifications

Compatibility.

• Videos & Tutorials
• Case Studies
• Associations

The CR310 is a multi-purpose, compact, low-cost measurement and control data logger that includes an integrated 10/100 Ethernet port and removable terminal connectors. This entry-level data logger, with its rich instruction set, can measure most hydrological, meteorological, environmental, and industrial sensors. It will concentrate data, making it available over varied networks and deliver it using your preferred protocol. The CR310 also performs automated on-site or remote decision making for control and M2M communications. The CR310 is ideal for small applications requiring long-term, remote monitoring and control.

The primary differences between the CR300 and CR310 are that the CR310 offers removable connectors and a 10/100 Ethernet connection.

The CR310 has multiple radio options that are suitable for different regions:

• CR310-RF407: US and Canada
• CR310-RF412: Australia and New Zealand
• CR310-RF422: Europe
• CR310-RF427: Brazil

Note:  Campbell Scientific does not recommend the CR310 for use as a PakBus router in networks with more than 50 devices. Large arrays or string variables may also reach memory limits. For such applications, a CR1000X Measurement and Control Datalogger is recommended.

Benefits and Features

• Set up easily with PC software and USB connectivity
• Measure with confidence analog and digital sensors
• Internet ready–email, FTP, HTTP/web, TCP–with required add-ons
• Trust in the Campbell Scientific quality, including integral surge and ESD protection
• Save money and space using the integrated Ethernet port
• Network wirelessly to another node or Internet gateway with integrated radio option
• CR310-WIFI ideal for short-range, wireless IP communication
• Wiring made easy through removable terminal block
• Communicate from anywhere when using cellular or satellite peripheral
• Charge batteries using the integrated 12 V battery solar charge regulator
• Measure smart sensors using RS-232 or SDI-12
• Connect with PakBus, Modbus, DNP3, GOES, and other standard communication protocols
• Analyze and control with programmability and multiple general purpose I/O
• Notify with event-driven communications and physical outputs

Similar Products

Detailed Description

Terminal descriptions.

• One switched 12 V terminal (SW12V) for powering sensors or communication devices, 1100 mA @ 20°C 
• Two sensor excitation or continuous 0.15 to 5 V terminals (VX1, VX2) for sensor excitation or output control
• Analog inputs: 6 single-ended or 3 differential inputs with -100 to +2500 mV and ±34 mV ranges 24 bit ADC
• 4 to 20 mA or 0 to 20 mA inputs (SE1, SE2 only)
• High frequency counter (35 kHz)
• Pulse width modulation
• Interrupts and timer input
• Period average (200 kHz, amplitude dependent)
• Switch closure (150 Hz)
• Low level ac (20 kHz)
• High frequency counter (20 kHz)
• High frequency counter (3 kHz)
• General status/control
• Voltage source 5 V: 10 mA @ 3.5 V
• Serial asynchronous communication Tx/Rx pair

Note: The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.

Additional Compatibility Information

Measurement & control peripherals.

The CR310 is typically not used with measurement and control peripherals because of its limited number of control ports. It is also compatible with low on current and voltage solid-state relays.

The CR310 is not compatible with SDM or CDM devices.

With several channel types, the CR310 is compatible with nearly every available sensor. This includes analog output voltage (0 to 2.5 V) and current (0 to 20 mA or 4 to 20 mA) sensors, thermistors, and RTDs to name a few. It is also compatible with pulse or frequency output sensors such as anemometers, rain gauges, and flow meters. CR310 dataloggers are not capable of applying reverse excitation, and they cannot be used with some conductivity or soil matric potential sensors.

SDI-12, Modbus, and other serial sensors are supported with the RS-232 port and C1 and C2 as a Tx/Rx pair. The CR310 does not directly support RS-485 sensors.

Communications

The CR310 can communicate with a PC via its USB port. Compatible telemetry devices include our RS-485 converters, digital cellular gateways, RF telemetry, and satellite transmitters. Data can be viewed on an iOS device, an Android device, or CD295 DataView II Display. To use an iOS or Android device, go to the Apple Store or Google Play and download our free LoggerLink Mobile Apps.

The CR300 series is compatible with CRBasic (version 3.6 or higher).

The CR310 uses an external power source and has a built-in charger/regulator. Intelligent power sourcing autoselects the highest voltage from three input sources (Chg, Bat, or USB) to operate in one of the following four modes:

• UPS (recommended) - A 16 to 32 Vdc source, solar panel (SP10, SP20), or power converter (29796) is used to charge a 12 Vdc battery, such as our BP7 or BP12.
• 12 Vdc battery or other reliable 12 Vdc source
• Chg only - DC power supply (16 to 32 Vdc)
• USB - Powered over 5 Vdc USB port for setup, programming, and testing (will not charge battery or boost USB power to provide 12 Vdc to the switched battery terminal SW12)

An ENC10/12 or ENC12/14 enclosure is adequate for most CR310-based systems. 

• CR310 Datalogger with Ethernet
• CR300-Series Specifications Sheet
• Cellular Data Services
• CR300 Series Getting Started Guide (PDF)
• CR300 Series Product Manual (online)
• CR300 Series Product Manual (PDF)
• CR300 Series CRBasic Help (online)

Technical Papers

• CR300 Series: CELL200-Series Cellular Module Firmware Update
• CR300-Series-WiFi Daughter Board OS Update Procedure
• Data Streaming
• The Link Budget and Fade Margin
• Line of Sight Obstruction
• Measuring a PRT or Thermistor without a Completion Resistor
• FTP Troubleshooting
• CR310 and 33203 EU Declaration of Conformity
• CR310 and 33203 UK Declaration of Conformity
• CR310 FCC Supplier Declaration of Conformity and FCC Statement
• CR310-CELL210 FCC Supplier Declaration of Conformity and FCC Statement
• CR310-CELL215 EU Declaration of Conformity
• CR310-CELL215 UK Declaration of Conformity
• CELL220 Supplier Declaration of Conformity
• CR310-RF407 FCC Supplier Declaration of Conformity and FCC Statement
• CR310-RF422 EU Declaration of Conformity
• CR310-WIFI EU Declaration of Conformity
• CR310-WIFI UK Declaration of Conformity
• CR310-WIFI FCC Supplier Declaration of Conformity and FCC Statement

Miscellaneous

• Cellular Modem Frequency Bands
• CELL205 Software Update Notification

Videos & Tutorials

CR300 Series OS v.11.00 (4.93MB) 02-21-2024

This download is for the CR300 series of dataloggers including all CR300 and CR310 models. Execution of this download places the Operating System file(.obj) on your computer. It also updates the CRBasic Editor compiler and support files. 

Why Update? This OS fixes issues related to the TX325/TX326, SDI12Recorder and the addition of MQTT along with other fixes and new features. See the revision history for a complete list. With this OS update, it is recommended that you also update the Device Configuration Utility to the most recent version so that new datalogger features are available in the utility.  

Note/Warning:  Campbell Scientific always recommends updating operating systems on site if possible. When remote updates are required, it is recommended that you implement the necessary precautions to handle unexpected OS upload complications. All datalogger settings should be retained when updated remotely. If you choose to roll back to a previous operating system, the datalogger settings will be reset to default.

Watch the Video Tutorial: Sending an OS to a Local Datalogger.

CR300 Series Wifi OS Update v.1.7.12 (1.97 MB) 05-13-2022

Manufacturer chipset maintenance update.

CR300 QuickStart Program (569 KB) 03-15-2016

The CRBasic program referenced in the CR300 QuickStart videos and manual.

Data Logger Wiring Excel Template (1 KB) 03-26-2024

This is a data logger wiring diagram spreadsheet template that accompanies the Wiring Diagram Video. The spreadsheet includes templates for  CR6, CR1000X, CR300, CR310, and CR350 data loggers. The file is an Excel template and works best with Microsoft Excel.  

Frequently Asked Questions

Number of FAQs related to CR310 : 1

Refer to the FTP Troubleshooting application note for help. 

Case Studies

Articles and Press Releases

Blog articles.

Newsletter Articles

• New Cellular Module Options for Dataloggers 04-17-2018
• CR310: Compact Datalogger with Ethernet 01-16-2017

Press Releases

• Campbell Scientific releases CR310 datalogger 01-10-2017

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General Data

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Overall length:

Maximum beam:, displacement:, straightening:, sail details mq, equipments:.

CR310 Datalogger with Ethernet

• Similar Products
• Detailed Description

Specifications

Compatibility.

• Videos & Tutorials

The CR310 is a multi-purpose, compact, low-cost measurement and control data logger that includes an integrated 10/100 Ethernet port and removable terminal connectors. This entry-level data logger, with its rich instruction set, can measure most hydrological, meteorological, environmental, and industrial sensors. It will concentrate data, making it available over varied networks and deliver it using your preferred protocol. The CR310 also performs automated on-site or remote decision making for control and M2M communications. The CR310 is ideal for small applications requiring long-term, remote monitoring and control.

The primary differences between the CR300 and CR310 are that the CR310 offers removable connectors and a 10/100 Ethernet connection.

The CR310 has multiple radio options that are suitable for different regions:

• CR310-RF407: US and Canada
• CR310-RF412: Australia and New Zealand
• CR310-RF422: Europe
• CR310-RF427: Brazil

Note:  Campbell Scientific does not recommend the CR310 for use as a PakBus router in networks with more than 50 devices. Large arrays or string variables may also reach memory limits. For such applications, a CR1000X Measurement and Control Datalogger is recommended.

Benefits and Features

• Alambrado más fácil con los bloques de terminales removibles

3D/CAD Files:

Similar products.

Detailed Description

Terminal descriptions.

• One switched 12 V terminal (SW12V) for powering sensors or communication devices, 1100 mA @ 20°C 
• Two sensor excitation or continuous 0.15 to 5 V terminals (VX1, VX2) for sensor excitation or output control
• Analog inputs: 6 single-ended or 3 differential inputs with -100 to +2500 mV and ±34 mV ranges 24 bit ADC
• 4 to 20 mA or 0 to 20 mA inputs (SE1, SE2 only)
• High frequency counter (35 kHz)
• Pulse width modulation
• Interrupts and timer input
• Period average (200 kHz, amplitude dependent)
• Switch closure (150 Hz)
• Low level ac (20 kHz)
• High frequency counter (20 kHz)
• High frequency counter (3 kHz)
• General status/control
• Voltage source 5 V: 10 mA @ 3.5 V
• Serial asynchronous communication Tx/Rx pair

Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.

Additional Compatibility Information

Measurement & control peripherals.

The CR310 is typically not used with measurement and control peripherals because of its limited number of control ports. It is also compatible with low on current and voltage solid-state relays.

The CR310 is not compatible with SDM or CDM devices.

With several channel types, the CR310 is compatible with nearly every available sensor. This includes analog output voltage (0 to 2.5 V) and current (0 to 20 mA or 4 to 20 mA) sensors, thermistors, and RTDs to name a few. It is also compatible with pulse or frequency output sensors such as anemometers, rain gauges, and flow meters. CR310 dataloggers are not capable of applying reverse excitation, and they cannot be used with some conductivity or soil matric potential sensors.

SDI-12, Modbus, and other serial sensors are supported with the RS-232 port and C1 and C2 as a Tx/Rx pair. The CR310 does not directly support RS-485 sensors.

Communications

The CR310 can communicate with a PC via its USB port. Compatible telemetry devices include our RS-485 converters, digital cellular gateways, RF telemetry, and satellite transmitters. Data can be viewed on an iOS device, an Android device, or CD295 DataView II Display. To use an iOS or Android device, go to the Apple Store or Google Play and download our free LoggerLink Mobile Apps.

The CR300 series is compatible with CRBasic (version 3.6 or higher).

The CR310 uses an external power source and has a built-in charger/regulator. Intelligent power sourcing autoselects the highest voltage from three input sources (Chg, Bat, or USB) to operate in one of the following four modes:

• UPS (recommended) - A 16 to 32 Vdc source, solar panel (SP10, SP20), or power converter (29796) is used to charge a 12 Vdc battery, such as our BP7 or BP12.
• 12 Vdc battery or other reliable 12 Vdc source
• Chg only - DC power supply (16 to 32 Vdc)
• USB - Powered over 5 Vdc USB port for setup, programming, and testing (will not charge battery or boost USB power to provide 12 Vdc to the switched battery terminal SW12)

An ENC10/12 or ENC12/14 enclosure is adequate for most CR310-based systems. 

• CR300 Series Product Manual (PDF)

Videos & Tutorials

CR300 Series Wifi OS Update v.1.7.12 (1.97 MB) 13-05-2022

Manufacturer chipset maintenance update.

Data Logger Wiring Excel Template (1 KB) 26-03-2024

This is a data logger wiring diagram spreadsheet template that accompanies the Wiring Diagram Video. The spreadsheet includes templates for  CR6, CR1000X, CR300, CR310, and CR350 data loggers. The file is an Excel template and works best with Microsoft Excel.  

Frequently Asked Questions

Number of FAQs related to CR310 : 1

Refer to the FTP Troubleshooting application note for help. 

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• International

March 25 Moscow concert hall attack

By Antoinette Radford and Aditi Sangal , CNN

Putin says Moscow attack was carried out by "radical Islamists." But he also blames Ukraine

From CNN's Mariya Knight in Atlanta, Darya Tarasova and Sugam Pokharel in London

Russian President Vladimir Putin said on Monday that the brutal attack at a Moscow concert hall on Friday was carried out by “radical Islamists.” 

“We know that the crime was committed by radical Islamists, whose ideology the Islamic world itself has been fighting for centuries,” Putin said.

He also again suggested that Ukraine was to blame for the attack.

“It is also necessary to answer the question why the terrorists tried to go to Ukraine after committing a crime, who was waiting for them there? It is clear that those who support the Kyiv regime do not want to be accomplices of terror and sponsors of terrorism, but there are really a lot of questions,” he said in a meeting via videoconference with government officials, special services and law enforcement agencies on measures taken after the terrorist attack, according to the Kremlin.

“We know by whose hands this atrocity was committed against Russia and its people, and we are interested in who the instigator is,” Putin said.

ISIS claimed responsibility for the massacre and released graphic footage showing the incident – but the Kremlin has alleged, without evidence, that the perpetrators planned to flee to Ukraine. Kyiv has vehemently denied involvement and called the Kremlin’s claims “absurd.”

Putin on Saturday also claimed that a “window” had been prepared for the attackers to escape to Ukraine. He did not provide evidence.

The post has been updated with more details from Putin's remarks.

Death toll in Moscow concert hall attack rises to 139, Russian official says

From CNN’s Dasha Tarasova in London

Two more people have been confirmed dead following a brutal attack at a Moscow concert hall on Friday, taking the death toll to at least 139 killed, a senior Russian official said on Monday.

“Initial results of the investigation indicate that the attack was carefully planned and prepared,” Alexander Bastrykin, the head of the Investigative Committee of Russia, said in a live TV broadcast.

Here's the numbers he provided:

• Deaths: 139 people killed. 137 died on the spot, two died in hospitals.
• Identified: 75 of 139 people have been identified, including three children.
• Cause of death: 40 people died from gunshot wounds, two people died from a combination of gunshot and stab wounds. As a result of the fire, 45 people died from exposure to high temperature and combustion products.

US says that it warned Russia in early March of possible terror attack despite ambassador's denial

From CNN’s Michael Conte 

The US State Department said Monday that the United States had warned Russia in early March about a planned terrorist attack in Moscow “potentially targeting large gatherings, including concerts."

Spokesperson Matthew Miller was responding to a denial by the Russian Ambassador to the US Anatoly Antonov that Moscow received any warning.

“We gave them that private warning consistent with our duty to warn ... when we see or when we gather intelligence of terrorist attacks or potential terrorist attacks,” Miller said at a press briefing. 

He noted the United States on March 7 warned US citizens to avoid large gatherings in Moscow.

Russian President Vladimir Putin had described the security warning as “provocative” and “outright blackmail” before the attack.

“It was because of that warning that we passed on to the Russian government that we issued a security warning on March 7, where we again said to US citizens that we had information about a planned terrorist attack in Moscow… potentially targeting large gatherings including concerts,” Miller added. 

Here's what you need to know about the Moscow concert hall attack that killed 137 people

From CNN staff

All four suspects in the Crocus City concert hall attack case have been remanded into pre-trial detention until May 22. They are charged with committing a terrorist act, according to the courts of general jurisdiction of the city of Moscow, which under the Russian Criminal Code is punishable by up to life imprisonment.

Three of the defendants pled guilty to all charges, according to state media news agency TASS.

All four are from Tajikistan, a former Soviet republic, and had been in Russia on either temporary or expired visas.

On Monday afternoon, authorities said they had identified an additional three people who they believed were involved in the attack — two brothers and a father.

Friday's attack killed at least 137 people. The attack is Russia's deadliest in two decades .

Catch up on the latest developments:

• Day of mourning: Russian President Vladimir Putin declared Sunday a day of national mourning for the 137 victims in Friday's attack .
• Authorities work to identify victims: Procedures to identify those killed in the attack have begun, the city’s Department of Health said, according to Russian state news agency RIA Novosti. The Russian Investigative Committee said 62 bodies had been identified so far, adding that "for the remaining victims, genetic examinations are being carried out to establish their identities."
• Fighting terrorism in Syria and Turkey: Putin held separate calls with his Turkish and Syrian counterparts, Recep Tayyip Erdogan and Bashar al-Assad, on Saturday and promised closer cooperation in fighting terrorism following the attack, according to a Kremlin readout.
• Russian Embassy says no warnings from US: The Russian Embassy in Washington says it did not receive any warnings about a potential attack in Moscow from the US. Last week, Putin dismissed warnings by the US embassy in Russia that there could be attacks on large groups.
• Putin links attack to Ukraine: Putin said the main suspects arrested planned to flee into Ukraine. Ukraine has denied any connection. The UK warned that Russia was creating a "smokescreen of propaganda."
• Terror alert: France has lifted its terror alert to its highest level following the deadly attack in Moscow, French Prime Minister Gabriel Attal said Sunday.

Russian social media channels show apparent torture of Crocus City suspects

From CNN’s Nathan Hodge

Video footage and still images have appeared on Russian social media that appear to show the violent interrogation of several of the men alleged to have taken part in the deadly terror attack on a concert hall outside Moscow Friday. 

One video appears to show one of the suspects, Saidakrami Rachabalizoda, being held on the ground while having part of his ear cut off by a camouflage-wearing interrogator. Rachabalizoda later appeared in court with a heavily bandaged ear. 

The Grey Zone, a pro-Kremlin Telegram channel, published a still photograph that claims to show the electrocution of one of the detained suspects.

Margarita Simonyan, the editor-in-chief of Russian state propaganda network RT, posted a video that appears to show the interrogation of another suspect, Shamsidin Fariduni, who is shown stammering and shaking as he is questioned by interrogators off camera. Fariduni subsequently appeared in court with a bruised face. 

CNN asked the Kremlin about the “visible signs of violence” committed against the suspects, but spokesperson Dmitry Peskov declined to comment.  

Russian Investigative Committee asks court to detain three more in connection with concert hall attack

From CNN's Tim Lister and Darya Tarasova

The Russian Investigative Committee says it has established that more people were involved in Friday's Crocus City terror attack beyond the four men alleged to have carried out the attack.

“According to the investigation, in order to commit a terrorist act, Shamsidin Fariduni recruited Aminchon Islomov into the organized group no later than January 2024, and Dilovar Islomov no later than March 11, 2024,” the Investigative Committee said on Telegram. 

The three individuals are two brothers and their father, Russian state media agency TASS said. Investigators are asking the Basmanny Court of Moscow to choose a preventive measure for the three defendants, the court told TASS.

“Three more materials were received regarding the accused Islomov Aminchon Isroilovich, Islomov Dilovar Isroilovich, as well as the suspect Islomov IsroilIbragimovich,” the court said, according to TASS. Fariduni was one of those detained in Bryansk Saturday. Both Aminchon and Dilovar Islomov appeared in Basmanny court in Moscow Monday. State news agency TASS said that Dilovar Islomov is a citizen of the Russian Federation and works as a taxi driver, citing court documents.

Russian state news agency RIA said Dilovar Islomov “owned the Renault car in which the terrorists fled the crime scene, sold it in February, and the compulsory motor liability insurance remained on him,” citing a source familiar with the situation.

Here's what to know about ISIS-K, the group linked to the Moscow concert hall terror attack

From CNN's Jessie Yeung

ISIS, also known as the Islamic State group, claimed responsibility for  Friday’s deadly assault  on a concert venue in Moscow, releasing graphic footage purporting to show its gunmen carrying out what was Russia’s worst terror attack in decades.

Here's what we know about the group:

When was it formed?: ISIS-K was formed in 2015 and has been active in  Afghanistan , Pakistan and Iran. It is a branch of ISIS, the terror group that emerged in Syria and Iraq and, at its peak, controlled a huge stretch of territory. Five years since the  fall of ISIS’ self-proclaimed caliphate  across Iraq and Syria, the group has morphed into a terror network with cells spread around the world, including in Africa, the Middle East, Central Asia and Southeast Asia.

How is it linked to ISIS? The connection between the groups is not entirely clear. The affiliates share an ideology and tactics, but the depth of their relationship – such as the chain of command and control – has never been fully established.

What is its ideology?: Like its parent organization, ISIS-K aims to create a “pure Islamic state,” according to the Center for Strategic and International Studies (CSIS) – describing the group’s vision of a “global, transnational caliphate” governed by Sharia law.

Why attack Russia?: ISIS has a longstanding animosity against Russia and Putin, several experts told CNN. “Russia has been at the top or near the top of the list of ISIS for many years,” said Daniel Byman, director of Georgetown University’s security studies program.

Read more about  ISIS-K here.

Russians return to site of Moscow terror attack to offer condolences

From CNN's Matthew Chance and Katharina Krebs in Moscow

Four days after Friday's Moscow terror attack, some 200 people gathered at the site of the attack Monday morning, offering condolences to the victims, a CNN team in Moscow reports.

While the crowd was much smaller than the numbers who were at the Crocus City hall on Sunday, a steady flow of people were bringing flowers and stuffed toys to the scene, according to the CNN team. Candles were also laid next to the memorial.

A Russian Red Cross tent is set up at the location to provide psychological help. The CNN team said volunteers are helping people with directions on where to pick up belongings or cars left on Friday. The main entrance of the Crocus hall remains barricaded off, with police buses and emergency vehicles clearing rubble. Search operations are still ongoing.

The victims: Moscow's Department of Health published an updated list of those still hospitalized in the capital's medical institutions after the attack, consisting of 76 names.

At least 137 people died in the attack after gunmen opened fire on people inside the hall, and set fire to the building. Of them, at least three were children. President Vladimir Putin declared Sunday a day of national mourning, vowing to punish the perpetrators and expressing condolences to those who had lost loved ones.

Tajikistan reiterates readiness to cooperate with Russia against terrorism after Moscow concert attack 

From CNN's Anna Chernova

Following the identification of the four men charged with carrying out the attack in Moscow on Friday as Tajik nationals, Tajikistan has reiterated its readiness to fight terrorism together with Russia.

The Russian state news agency TASS published video Monday showing Tajik Prime Minister Kokhir Rasulzoda writing a note in the book of condolences at the Russian embassy in Dushanbe.

State-run RIA Novosti reported on its Telegram channel that Tajikistan is providing assistance to the Russian investigation “in the case of the terrorist attack in Crocus,” citing a source in Tajikistan’s special services. It reported that a source in the Russian Foreign Ministry had confirmed that “Tajikistan specialists are providing assistance to investigators from Russia in connection with the arrest of citizens of the republic in the case of a terrorist attack.”

On Sunday, the Kremlin said that Russian President Vladimir Putin had spoken with his Tajik counterpart Emomali Rahmon, who had expressed “deep condolences and feelings of solidarity with the Russian people in connection with the death of civilians as a result of the vile terrorist attack at Crocus City Hall."

“During the conversation, Vladimir Putin and Emomali Rahmon noted that special services and relevant departments of Russia and Tajikistan are working closely in the field of countering terrorism, and this work will be intensified,” the Kremlin said. 

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Moscow concert attack: More than 60 reported dead; ISIS claims responsibility

This live blog has ended. For the most recent updates, please click here .

What we know about the Moscow concert attack

• Men in camouflage broke into a Moscow concert hall and opened fire, shooting an unknown number of people, Russia’s prosecutor general said.
• The terror group ISIS has claimed responsibility but did not provide proof of the claim, which was made on ISIS-affiliated news agency Amaq on Telegram.
• Russia's Investigative Committee said that more than 60 people are dead after the attack at Crocus City Hall. Officials have said more than 100 others were injured.
• A fire also started inside Crocus City Hall, a large concert venue northwest of central Moscow. Firefighters have evacuated about 100 people from the basement of the building and efforts are underway to rescue people from the roof, Russian emergency officials said.
• Russia officials said they were investigating the attack as a terrorist act.
• A popular rock band was scheduled to play what appeared to be a sold-out show at the venue, which has a maximum capacity of more than 9,000 people.

Three children among those killed, state media reports

Chantal Da Silva

Three children were among the more than 60 people killed in yesterday's attack at Crocus City Hall, Russian news agency RIA Novosti reported, citing the Russian Ministry of Health.

Officials have warned that the death toll connected to the deadly incident may increase as the investigation continues.

Xi sends condolences to Putin

Chinese President Xi Jinping sent condolences to Russian President Vladimir Putin on Saturday after a deadly shooting at a concert hall near Moscow, saying China opposes all forms of terrorism and strongly condemns terrorist attacks.

China firmly supports the Russian government’s efforts to maintain national security and stability, Xi said, according to CCTV state television. 

Moscow bloodshed comes two decades after some of worst attacks in Russia

Phil Helsel

The shooting attacks in Moscow are the latest in a series of deadly terror attacks in the country since the 2000s.

In 2004, militants from Chechnya and elsewhere took hostages at a school in Beslan in southern Russia.

The militants demanded a withdrawal from Chechnya. Hostages were kept in a gymnasium, and 334 died — half of them children — when gunfire and explosions erupted when it was stormed. Hostages’ families were critical of the rescue operation. Russian prosecutors later cleared authorities .

Two years prior, in 2002, Chechen separatists attacked the Dubrovka Theater in Moscow and took more than 700 people hostage. Russian forces used gas, and 129 hostages died. The attackers were killed.

More recently, in 2017 a suicide bomber from Kyrgyzstan killed 15 people as well as himself in an attack on a St. Petersburg subway. In 2013, two bombers killed a combined 34 people in attacks on a railway station and a trolleybus in Volgograd.

The group Islamic State, also known as ISIS, claimed responsibility for the attacks Friday at the Crocus City Hall venue.

Putin wishes victims well, deputy prime minister says

President Vladimir Putin is thinking of those injured in today’s attack and thanked doctors, a Russian government official said according to state media.

State media TASS reported that “Putin wished all those injured in the emergency at Crocus City Hall to recover and conveyed his gratitude to the doctors, Golikova said,” referring to Tatiana Golikova deputy prime minister for social policy, labor, health and pension provision.

More than 60 dead, and death toll could grow, Russian agency says

Russia’s Investigative Committee said Saturday that more than 60 people have died in the attack, and warned the number may increase.

“The bodies of the dead are being examined. It has been previously established that more than 60 people died as a result of the terrorist attack. Unfortunately, the number of victims may increase,” according to the Investigative Committee, which is a federal state agency.

Russia's Ministry of Internal Affairs and the security agency FSB are continuing to investigate, the committee said in a statement, and weapons and ammunition have been found.

U.S. warned Russia about planned terrorist attack in Moscow, NSC says

Monica Alba

The United States shared information about a potential terrorist attack in Moscow with Russia’s government earlier this month, a spokesperson for the National Security Council said.

The U.S. Embassy in Russia on March 7 warned U.S. citizens to avoid crowds and said it was monitoring reports that extremists might attack large gatherings in Moscow.

“Earlier this month, the U.S. Government had information about a planned terrorist attack in Moscow — potentially targeting large gatherings, to include concerts — which prompted the State Department to issue a public advisory to Americans in Russia,” NSC spokesperson Adrienne Watson said.

“The U.S. Government also shared this information with Russian authorities in accordance with its longstanding ‘duty to warn’ policy,” Watson said.

Putin recently dismissed ‘provocative’ warning about potential attacks

In remarks that aired three days ago, Russian President Vladimir Putin accused the West of “provocative statements” about potential terror attacks in Russia, and dismissed them.

“I’ll remind you of recent, let’s say directly, provocative statements of certain official Western structures about potential terror attacks in Russia,” Putin said.

“All of this looks like obvious blackmail and an attempt to intimidate, destabilize our country,” he said before the state security agency FSB.

Putin in those remarks did not specify a country or warning. The U.S. embassy in Russia on March 7 warned U.S. citizens to avoid crowds .

“The Embassy is monitoring reports that extremists have imminent plans to target large gatherings in Moscow, to include concerts, and U.S. citizens should be advised to avoid large gatherings over the next 48 hours,” the U.S. embassy warned.

Guards at concert hall didn't have guns, state news says

The Associated Press

Guards at the concert hall didn’t have guns, and some could have been killed at the start of the attack, Russian media reported.

Some Russian news outlets suggested the assailants fled before special forces and riot police arrived.

Reports said police patrols were looking for several vehicles the attackers could have used to escape.

U.S. had been gathering intelligence that ISIS could attack Russia

Ken Dilanian

The U.S. had been gathering intelligence for months that ISIS could mount a mass casualty attack in Russia, two U.S. officials confirmed to NBC News.

That information led to a March 7 warning issued by the U.S. embassy in Russia about possible extremist attacks, including at concerts, urging people to stay away from large gatherings, one of the officials said.

That official said the claim of responsibility today by ISIS appears to be genuine, though no final assessment had been made about who was responsible.

Some Moscow concertgoers filmed events as they unfolded Friday night, when gunmen opened fire inside a theater and people ran to take cover in fear for their lives.

Witness says gunfire was first thought to be construction noise

A witness to today’s armed attack on Moscow’s Crocus City Hall told a state news agency that they first mistook the gunfire for sounds of an installation being dismantled.

“First, we started hearing typical loud pops, but it was impossible to understand that they were gunshots. We thought that something was falling, as exhibitions were being dismantled at that moment, and someone seemed to be dropping something large,” Mikhail Semyonov told TASS .

“Then, the bangs were getting more and more frequent. Suddenly, there was a scream, and the bangs started to be heard as bursts. Then it became clear that it was shooting,” he said.

ISIS claims responsibility for attack but does not provide proof

The terror group Islamic State has claimed responsibility for the attack in Moscow.

The group, also known as ISIS, did not provide any proof of its claim, which came from ISIS-affiliated news agency Amaq on Telegram.

The group’s members have carried out a number of terror attacks, including the 2015 attacks in Paris that killed 130 people.

Children among the victims, Russia's children commissioner says

Yuliya Talmazan

Russia’s commissioner for children’s rights, Maria Lvova-Belova, said children were among the victims of tonight's attack.

"Information about their condition is regularly updated," Lvova-Belova said on Telegram. "Any additional assistance will be provided immediately."

She later told Russia 24 TV channel that at least two children had been injured, including one boy with a gunshot wound.

Earlier, Russian officials released a preliminary casualty toll of at least 40 people dead and more than 100 injured.

France, U.K., Germany condemn attack

Officials from France, the U.K. and Germany were among those who expressed their condolences to the victims of the attack at the Crocus concert hall.

"The images of the terrible attack on innocent people in Crocus City Hall near #Moscow are horrific," Germany's Foreign Office said on X . "The background must be investigated quickly. Our deepest condolences with the families of the victims."

"We condemn the terrorist attack in the Crocus City Hall near Moscow," the U.K.'s embassy in Russia said . "This is a terrible tragedy."

Meanwhile, France's foreign ministry called for "full light" to be shed on "these heinous acts."

Public events across Russia called off after attack

Several regional leaders across Russia, including in the annexed Kherson region of Ukraine, have canceled public events this weekend over security considerations after the deadly concert attack in Moscow.

Shortly after the attack, Moscow Mayor Sergey Sobyanin canceled all sports, cultural and other public events in Moscow this weekend. State news agency TASS also quoted Russia's cultural ministry as saying that mass and entertainment events in federal cultural institutions have been canceled in the coming days.

Zelenskyy adviser speaks out about attack

President Volodymyr Zelenskyy’s adviser denied that Ukraine was involved in the deadly Crocus concert hall attack.

“Ukraine certainly has nothing to do with the shooting/explosions in the Crocus City Hall (Moscow Region, Russia),” Mykhailo Podolyak wrote on X. “It makes no sense whatsoever.”

No evidence has emerged to suggest Ukraine may have been involved, but Ukrainian officials may be trying to pre-empt accusations, as some Kremlin hawks have already started pointing at Kyiv. 

Asked whether the shooting was at all tied to the war in Ukraine, U.S. National Security Council spokesperson John Kirby said: “There is no indication at this time that Ukraine, or Ukrainians, were involved in the shooting, but again, this just broke. We’re taking a look at it, but I would disabuse you at this early hour have any connection to Ukraine.”

Videos posted to social media appear to show chaos inside Moscow's Crocus City Hall during and after a terrorist attack.

Some videos include what sound like gunshots and show men with rifles, as concertgoers frantically try to exit the venue.

State Department issues warning to Americans in Moscow

Jason Abbruzzese

The State Department said that the U.S. Embassy in Moscow is aware of the terrorist attack on Crocus City Hall and that U.S. citizens should avoid the area and follow the instructions of local authorities.

"The U.S. government’s ability to provide routine or emergency services to U.S. citizens in Russia is severely limited, particularly in areas far from the U.S. embassy in Moscow, due to Russian government limitations on travel for U.S. embassy personnel and staffing, and the ongoing suspension of operations, including consular services, at U.S. consulates in Russia," the State Department said in a message posted to its website .

'What a nightmare in Crocus,' Widow of opposition leader Alexei Navalny condolences about concert attack

Yulia Navalnaya, the widow of Russian opposition leader Alexei Navalny who died in prison last month, expressed her condolences about the attack Friday.

"What a nightmare in Crocus," Navalnaya wrote on X. "Condolences to the families of the victims and quick recovery to the injured. Everyone involved in this crime must be found and held accountable."

320 firefighters, 3 helicopters working to put out fire

Russia's Ministry of Emergency Situations said the number of rescue crews responding to the attack is growing and now includes more than 320 firefighters, 130 emergency vehicles and three helicopters dumping water on the burning concert venue.

Moscow regional governor says 40 dead, more than 100 injured

Moscow Regional Governor Andrei Vorobyov said on Telegram that at least 40 people are dead and more than 100 injured in the terrorist attack, confirming figures previously reported by Russian state news.

Putin informed about concert venue attack 'in the first minutes,' Kremlin spokesperson says

Kremlin spokesperson Dmitry Peskov said President Vladimir Putin was informed about the shooting at the Crocus concert hall "in the first minutes" of the attack, Russian state news agency RIA reported.

The president is receiving information about what is happening and the measures being taken through all relevant services and is giving necessary instructions, Peskov said according to RIA.

Russian journalist was inside concert venue when gunmen entered

Russian news agency RIA Novosti said on Telegram that one of its reporters was inside the venue when gunmen entered and began shooting concertgoers.

The journalist said that at least three unmasked gunmen in camouflage entered the hall a few minutes before 8 p.m. Moscow time. They shot people point-blank and threw incendiary bombs, according to the journalist.

Russia's foreign ministry spokesperson calls incident 'bloody terrorist attack'

Maria Zakharova, spokesperson for Russia's foreign ministry, called the Friday night incident at the Crocus City Hall in Moscow a "bloody terrorist attack" as she called for "strong condemnation" from the international community.

"Now, as the Russian authorities have stated, all efforts are being devoted to saving people," Zakharova said. "The entire world community is obliged to condemn this monstrous crime!"

U.S. national security spokesperson says embassy has told Americans to avoid large gatherings in Moscow

Kyla Guilfoil

National Security Council Spokesman John Kirby addressed the attack in Moscow at a White House press briefing Friday afternoon, calling it a “terrible, terrible shooting attack.”

“The images are just horrible and just hard to watch and our thoughts obviously are going to be with the the victims,” Kirby said.

Kirby added that the U.S. embassy has notified all Americans in Moscow to avoid large gatherings, concerts, shopping malls, etc., and “stay put where they are” for their safety.

Russian media says 40 dead, more than 100 injured at concert attack

TASS, Russia's state-owned news agency, and RIA Novosti are reporting that Russia's FSB security agency has put the preliminary casualty count at 40 dead and more than 100 injured by a terrorist attack on a Moscow-area concert venue.

NBC News has not confirmed those casualty numbers.

Roof of concert venue at risk of collapse, Russian media says

Russian news agency RIA Novosti said on Telegram that the roof of the building near the concert venue's stage has begun to collapse.

Video posted to Telegram by RIA Novosti showed fire continue to blaze inside the venue.

Moscow area governor says more than 70 ambluances at scene of attack

Andrei Vorobyov, Moscow's regional governor, said on Telegram that more than 70 ambulances have been dispatched to the scene of concert venue attack.

“Everything is being done at the scene to save people," he wrote in the Telegram message. "The Special Rapid Response Unit (SOBR) has been deployed. There are over 70 ambulance carriages near Crocus, doctors provide the necessary assistance to all victims."

Nigel Chiwaya

Russia’s prosecutor general office says number of victims still being determined

Russia's prosecutor general said on Telegram that officials are working to determine how many people have been killed or hurt in the concert attack.

“On behalf of Igor Krasnov, the prosecutor of the Moscow region has gone to the scene of the incident at Crocus City Hall to coordinate the actions of law enforcement agencies," the prosecutor general's Telegram account posted. "Tonight, before the start of the event in the concert hall in Krasnogorsk, unknown men in camouflage clothes broke into the building and started shooting."

"The number of victims is being determined, a fire started in the entertainment center building, and citizens are being evacuated."

Moscow's mayor cancels weekend events

Moscow Mayor Sergei Sobyanin said on Telegram that he was canceling all public events in Moscow this weekend.

"I have taken the decision to cancel all sports, cultural and other public events in Moscow this weekend," he said. "I ask of you to treat this measure with understanding."

Popular rock band was to play sold-out venue that can hold 9,500

Tim Stelloh

A popular rock band was scheduled to play what appeared to be a sold-out show at the Moscow concert hall where there were reports of gunmen in combat fatigues opening fire.

Picnic, formed in 1978, was to play at Crocus City Hall, west of central Moscow.

The multilevel facility in Krasnogorsk has a maximum capacity of 9,527 people. Booking sites show the event was sold out.

Russia's aviation agency says additional security added to Moscow airports

The Russian aviation agency Rosaviatsiya said that additional security measures are being introduced in Moscow airports

"Due to increased security measures, we ask passengers to arrive at Sheremetyevo, Domodedovo, Vnukovo and Zhukovsky airports in advance," the agency said on the Telegram messaging app.

Moscow's emergency ministry says it is working to extinguish fire

Moscow’s emegency ministry said it was working to extinguish a fire that began at the music venue.

The ministry said about 100 people were evacuated from the building, and it was working to rescue people from the roof.

Russian media says state security taking action

Russia's news outlet RIA Novosti said that the country's security agency, the FSB, is taking measures to respond to the shooting at a concert hall near Moscow.

Videos posted by Russian media show men with rifles moving through area

Extended rounds of gunfire could be heard on multiple videos posted by Russian media and Telegram channels. One showed two men with rifles moving through a concert hall. Another one showed a man inside the auditorium, saying the assailants set it on fire, with incessant gunshots ringing out in the background.

Andrei Vorobyov, the governor of the Moscow region, said he was heading to the area and set up a task force to deal with the damage. He didn’t immediately offer any further details.

Russian media reports said that riot police units were being sent to the area as people were being evacuated.

Russian news outlets report gunman opened fire at Moscow concert hall

Several gunmen in combat fatigues burst into a big concert hall in Moscow on Friday and fired automatic weapons at the crowd, injuring an unspecified number of people, Russian media said.

Russian news reports said that the assailants also used explosives, causing a massive blaze at the Crocus City Hall on the western edge of Moscow. Video posted on social media showed huge plumes of black smoke rising over the building.

Russia’s state RIA Novosti news agency reported that at least three people in combat fatigues fired weapons. The state Tass news agency also reported the shooting.

U.S. warned of imminent Moscow attack by ‘extremists,’ urges citizens to avoid crowds

Patrick Smith

U.S. citizens in  Moscow  had been warned to avoid large gatherings earlier this month because of heightened fears of a terrorist attack.

The U.S. Embassy in the Russian capital said it was “monitoring reports that extremists have imminent plans to target large gatherings in Moscow, to include concerts, and U.S. citizens should be advised to avoid large gatherings over the next 48 hours.”

U.S. citizens should avoid crowds, monitor local media for updates and “be aware of your surroundings,” it said in a brief  online update .

Read the full story here.