40 dead and 100 injured in attack on Crocus City Hall in Krasnogorsk, Russia. Gunfire and explosions heard shortly before band Piknik's concert.
It is initially completely unclear who the attackers are. Moscow blames Kiev, but authorities in Kiev reject this. IS publishes letter of responsibility from the terrorist militia Islamic State, which Russia is fighting in Syria. Moscow theaters and museums in Moscow will remain closed over the weekend. Major events have been canceled - and security precautions are also being increased in other cities.