Gunmen opened fire at the 6,200-seat Crocus City Hall in Krasnogorsk near Moscow on Friday evening at a concert for the Russian rock group Piknik.

Sixty people were killed, a spokesperson for Russia’s Investigative Committee said in the early hours of Saturday according to Russian media, and the number may rise. Earlier authorities had said at least 145 were wounded. Ria news agency quoted Moscow governor Andrey Vorobyov as saying 110 adults and five children had been hospitalised, with 60 adults in a serious condition.

Up to five gunmen were believed to be involved in the attack, which was later claimed by Islamic State in a post on Telegram which suggested that the attackers had managed to escape afterwards. Videos released by social media channels close to the security services showed at least two armed men walking into the hall.

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