According to Russian media, the riot at the Cathedral Mosque in the city of Krasnoyarsk was caused by 27-year-old Varesh Artsunyan. He broke into the Krasnoyarsk Cathedral Mosque, barricaded the emergency exit with a board, and began to smash everything with a hammer. He broke windows, flowers, doors, destroyed the minbar (pulpit), and smashed the donation box.
Staff and visitors of the mosque tried to stop the vandal, but he behaved extremely aggressively and irrationally, attempting to attack them with a hammer and a stick with nails. He also tried to attack an elderly man, but fortunately, there were no casualties.
Later, the staff and visitors of the mosque managed to detain the vandal and handed him over to the police in an irrational state.