Gunmen have attacked a concert hall on the fringes of Moscow, killing at least 133 people and wounding 140 more, Russian security services say.
Attackers clad in camouflage gear took part in the attack, in the north-western suburb of Krasnogorsk, BBC-verified video shows.
Four men directly involved were among 11 arrested on Saturday, officials say.
Crocus City Hall was about to host a rock concert when the gunmen burst into the foyer and then the theatre itself.
Much of the building was engulfed by fire and part of the roof collapsed.
Children are said to be among the casualties and the Russian foreign ministry has condemned a “terrorist attack”.
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