According to the investigation, six to ten attackers, possibly helped by former or current FSKN staff, entered the building without any resistance, shot dead four officers (two guards, a driver and a member of a special unit, all of them ethnic Kabardins, who were first captured and then executed in the basement), looted armory of rapid-response unit, and then set the office ablaze before driving away in a GAZelle minibus loaded with the captured weapons.