The Russian Investigative Committee confirms the involvement of Ukrainians in the Crocus attack. The Islamic State organization claimed responsibility for this attack, but Russian officials confirm a link to Ukraine.

Kiev denies any involvement in the attack, and accuses Moscow of seeking to shift the blame on it. According to Russian reports, gunmen with automatic weapons stormed Crocus Hall during a concert last Friday, opened fire on security personnel at the entrance to the hall, then began shooting at the audience and setting fire to the building. The attack killed 143 people and injured 360 others.