In an act of barbarism that shocked Russia and the entire world, the terrorist group Islamic State (IS) has claimed responsibility for the atrocious attack carried out at a concert hall in Krasnogorsk, a suburb of Moscow.
The attack, which has left at least 133 dead and more than 140 injured, according to Russian security services, has proven to be one of the deadliest attacks in the Russian capital in the last two decades.
Eleven people have been arrested in connection with the incident. Four of them were directly involved in the attack, the head of the security forces informed the Russian president on Saturday.
