"Investigative-operational group completed the inspection of the scene in the secondary school №2 in the columns," - said in a statement in the Telegram-channel SC.
It is noted that senior pupils who were at school at the time of the emergency, employees of the educational institution, the parents of the suspect, employees of the internal affairs bodies who participated in the detention of the teenager were questioned.
The server on which the records of the school video surveillance system are stored has been withdrawn, its contents are being analyzed and informed by the department.
On February 11, a high school student killed a teacher and a schoolboy in Stolbtsy, and also stabbed two more students. He was detained.