RUSSIAN President Vladimir Putin says all four gunmen who carried out a deadly attack at a packed concert venue in Moscow have been arrested.
At least 133 people were killed and more than 140 injured when the attackers stormed the building, firing indiscriminately and setting it alight.
Authorities said 11 people were detained in total, and the four gunmen were caught while heading to Ukraine.
The Islamic State (IS) group says it was behind the attack.
On Saturday Amaq, the IS channel on Telegram, posted an image of the four masked men they claimed were involved in the assault. Russia has not commented on the IS claim.
The group later released highly graphic footage from the attack. The video, which has been verified by the BBC as genuine, shows one of the gunmen opening fire on several people. The BBC says it will not be broadcasting this video.
In a televised address, Mr Putin condemned the massacre – the deadliest in Russia for nearly 20 years – as a “barbaric terrorist act” and repeated earlier suggestions by Russian security services that the attackers had tried to escape to Ukraine.
Kyiv dismissed the claim that it was some way involved in the attack as “absurd”.
“To suggest the suspects were heading to Ukraine, would suggest they were stupid or suicidal,” Andriy Yusov, a spokesperson for the Ukrainian military intelligence directorate, told the BBC.
Ukrainian President Volodymyr Zelensky accused Mr Putin of seeking to “blame” Ukraine for the attack. “This worthless Putin, instead of dealing with his citizens of Russia, addressing them, remained silent for a day – thinking how to bring this to Ukraine,” he said in his nightly address.
The US National Security Council said it warned Russia of a potential attack on “large gatherings”, including concerts, in Moscow earlier this month. The Kremlin at the time dismissed that as “propaganda” and an attempt by Washington to meddle in the recent Russian election.
On Saturday, the White House said it condemned the “heinous” attack and described Islamic State as “a common terrorist enemy that must be defeated everywhere”.