What we know
- Russian President Vladimir Putin has delivered a public address, calling the attack a barbaric act of terrorism and vowing to punish the perpetrators. He also accused Ukraine of preparing a "window" to help the suspects escape. Kyiv has staunchly denied any role in the attack.
- Russia has arrested 11 people, including all four gunmen suspected of carrying out the attack at a crowded concert venue in a Moscow suburb last night, the head of the country's Federal Security Service (FSB) has told Putin.
- At least 133 people are now known to have been killed as more bodies were found in the rubble, Russia's Investigative Committee said this morning. Men in camouflage broke into the concert hall, opened fire, and set the crowded venue ablaze. The death toll is expected to rise.
- The terror group ISIS has claimed responsibility but did not provide proof of the claim. U.S. officials confirmed to NBC News that they had been gathering intelligence for months that ISIS could mount a mass casualty attack in Russia, though no final assessment had been made yet about who was responsible. U.S. Embassy officials issued a warning earlier this month urging people to stay away from large gatherings.
Coverage on this live blog has ended.
Sunday is day of mourning in Russia after tallest building stages tribute to fallen
Sunday was declared a day of mourning in Russia for those killed in Friday night's concert attack.
Putin made the declaration during a televised address to Russians in which he discussed the nation's response to the attack, which ended with 133 killed.
Also on Sunday, Dubai's 163-floor Burj Khalifa skyscraper was lit up in the colors of Russia's flag for "several minutes" to acknowledge the country's loss, according to Russian state news agency TASS.
Dubai authorities and the development company Emaar organized the tribute on the world's tallest building, the agency said.
According to United Arab Emirates state news from Emirates News Agency, other structures in the region, including the Abu Dhabi National Oil Company building, were lit up "in solidarity with Moscow."
Rescue operation over at concert hall, official says
The rescue operation on the scene of the Moscow attack is over, according to Moscow Oblast Gov. Andrey Vorobyov.
The search for victims at the concert hall is ongoing.
"Today rescuers cleared a huge layer of the auditorium," Vorobyov said in a statement on Telegram. "Over the course of 24 hours, 133 bodies were pulled out from under the rubble, and the identities of 50 dead were tentatively identified."
Officials have not publicly released the identities of the 50 victims.
"At night we will start creating an opening on the western side of Crocus, this will make it easier to access the concert hall," Vorobyov said.
Ukraine had nothing to do with Russia attack, U.S. says
The National Security Council said today in no uncertain terms that Ukraine had nothing to do with the deadly concert attack.
"ISIS bears sole responsibility for this attack. There was no Ukrainian involvement whatsoever," NSC spokesperson Adrienne Watson said in a statement.
In the initial hours after the attack, Putin suggested attackers were trying to escape in the direction of Ukraine. He also accused Ukraine of preparing a "window" to help suspects escape. Ukraine has staunchly denied any involvement.
Russian officials say all four suspects believed to be behind the concert shooting are in custody.
Watson noted that the United States "shared information with Russia about a planned terrorist attack in Moscow."
Yesterday, the security council said the warning was made “in accordance with its longstanding ‘duty to warn’ policy.”
In remarks that aired days before the attacks, Putin said the West’s warnings of any potential attacks in Russia were part of an “attempt to intimidate, destabilize our country.”
Intelligence officials have been gathering information for months that suggested ISIS could mount a mass casualty attack in Russia, U.S. officials confirmed to NBC News.
Russia's president in a video address late today vowed dire consequences for the four suspects apprehended in the concert attack and anyone else involved in the violence.
"No one will be able to sow poisonous seeds of discord," Putin warned in the remarks.
He also drew on history to say, essentially, that times of hardship will only make Russia stronger. "It will be so now," he said.
29 Moscow attack victims identified
The Russian Ministry of Health has identified 29 victims of yesterday’s attack in Moscow.
The preliminary list was published by the Russian Emergency Ministry tonight. No other details about the victims, including their ages, were published.
More than 50 people who were killed in the attack have been identified so far, Moscow Oblast Gov. Andrey Vorobyov told Russian state media RIA Novosti.
'They always blame others': Zelenskyy denounces Putin for linking Ukraine to deadly Moscow attacks
Ukrainian President Volodymyr Zelenskyy said Russian President Vladimir Putin is trying to blame "someone else" for the Moscow attack.
Putin accused Ukraine of preparing a “window” to help the suspects in the attack escape.
"What happened yesterday in Moscow is obviously just Putin and the other scum trying to blame it on someone else," he said in a statement shared on Telegram. "They always have the same methods. It has happened before. There have been bombed houses, shootings, and explosions. And they always blame others."
Zelenskyy said Putin's methods are "absolutely predictable."
"They come to Ukraine, burn our cities, and try to blame Ukraine. They torture and rape our people — and they blame them," he said. "They have brought hundreds of thousands of their own terrorists here, to Ukrainian soil, to fight against us, and they don’t care what happens inside their own country."
Zelenskyy believes Putin is trying to turn the situation "in favor of his personal power."
Fire extinguished at Crocus City Hall, Russian Emergency Ministry says
The fire at the Crocus City Hall has been extinguished, according to the Russian Emergency Ministry.
The ministry shared a video on Telegram of the destruction left behind by yesterday's attack in the area.
Over 130 people were killed in the attack and more than 100 are in Moscow hospitals with injuries, officials said.
Rescue workers will 'need a few more days to fully clear up the rubble' at the Crocus concert hall, Moscow official says
Rescue workers will "need a few more days to fully clear up the rubble" at the Crocus concert hall, according to Moscow Oblast Gov. Andrey Vorobyov.
"Specialists from the Russian Ministry of Emergency Situations — 104 people and 19 pieces of equipment — continue to clear the rubble in the concert hall and put out the remaining fires," he said in a statement shared to Telegram. "Rescuers will need a few more days to fully clear up the rubble."
Vorobyov said there is difficulty in accessing a wall that needs to be demolished in order to continue the search for victims.
"In the near future, special small equipment will arrive to help clear access and provide rescuers with passage," he said. "This will help continue the search operation."
Russian Investigative Committee to award man who allegedly neutralized one of the Moscow attack suspects
The Russian Investigative Committee will award a man who allegedly neutralized one of the suspects in yesterday's attack on a Moscow concert hall that killed over 130 people.
"A man, trying to protect his wife from terrorists who were shooting at people, attacked one of them and neutralized him," a statement on the committee's website said. "Through his active and decisive actions, he saved the lives of the people around him at that moment."
NBC News has not independently verified this information.
More than 50 people who were killed in the attack have been identified, Moscow Oblast Gov. Andrey Vorobyov told Russian state media RIA Novosti.