Russia: what we know about the deadly attack in a Moscow concert hall. Attackers opened fire on Friday in a concert hall located in the suburbs of Moscow, the Crocus City Hall.

More than 60 people were killed and dozens injured on the evening of Friday March 22 in an armed attack followed by a huge fire. The United States warned Russia in March of a terrorist attack that could target "large gatherings" in Moscow. The Islamic State group claimed on one of its Telegram accounts that its fighters "attacked a large gathering" in the vicinity of the Russian capital Moscow.