The Islamic State claims responsibility for the brutal massacre in a theater, and Putin tries to endorse the attack on Ukraine. A terrorist commando, which experts point out is part of the Islamic State of Khorasan (ISIS-K), has claimed responsibility.

The murderers killed in cold blood and one by one, with automatic combat weapons, more than a hundred of the spectators who attended a concert. The attack also occurred in a leisure place taking advantage of the gathering of thousands of people who were simply preparing to have a good time.