At least 40 folks have been killed after gunmen burst right into a live performance corridor in Moscow and fired on the crowd, in line with Russia's Federal Security Service.
The gunmen, carrying fight fatigues, additionally precipitated an enormous blaze on the Crocus City Hall. Russian media reported the venue's roof was collapsing.
The assault, which Russian authorities are investigating as terrorism, is Russia's deadliest lately.
More than 100 had been wounded, the FSB mentioned.
Footage taken contained in the auditorium exhibits as much as 4 gunmen firing computerized weapons as folks crouch and conceal behind seats.
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In different movies posted by Russian media and Telegram channels, prolonged rounds of gunfire could possibly be heard whereas two males with rifles had been transferring via the venue's mall.
Russian news stories mentioned the attackers threw explosives, triggering the huge blaze on the venue, the place flames and plumes of black smoke could possibly be seen rising into the air.
Reports mentioned concertgoers had been being evacuated however an unknown quantity might have been trapped by the blaze.
All tickets within the 6,200-seat live performance corridor for a efficiency by Soviet-era rock group Picnic had been bought out.
There had been no instant claims of accountability for the raid.
Moscow Mayor Sergei Sobyanin described the assault as a "huge tragedy" and cancelled all mass gatherings scheduled for the weekend.
Russian authorities mentioned safety had been tightened at Moscow's airports and railway stations.
President Vladimir Putin was receiving common updates concerning the taking pictures, Kremlin spokesman Dmitry Peskov mentioned.
White House nationwide safety adviser John Kirby mentioned he couldn't but talk about all the small print however that "the images are just horrible. And just hard to watch".
Mr Kirby mentioned there was "no indication at this time that Ukraine, Ukrainians were involved".
But Russia mentioned if the US knew for certain Ukraine was not concerned then it ought to share any info it had.
Russian international ministry spokeswoman Maria Zakharova mentioned: "On what basis do officials in Washington draw any conclusions in the midst of a tragedy about someone's innocence?"
She mentioned if Washington had info it ought to be shared and if it had no info it shouldn't be speaking in such a manner.
Ukraine's presidential adviser Mykhailo Podolyak mentioned Kyiv had nothing to do with the assault.
"Let's be straight about this: Ukraine had absolutely nothing to do with these events," Mr Podolyak mentioned.
"We have a full-scale, all-out war with the Russian regular army and with the Russian Federation as a country. Andregardless of everything, everything will be decided on the battlefield."
It comes days after Mr Putin secured his fifth time period as Russia's president in an electoral landslide.
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