UFA, April 18. /TASS/. The Investigative Committee is looking into the incident in a school in Sterlitamak, Bashkortostan Region.

"According to preliminary information, a 17-year-old student of a special class at general education school number 1 in the city of Sterlitamak entered a computer science room where his schoolmates were staying and wounded a schoolgirl in the hand, as well as a teacher, with a knife," the Investigative Committee said in a report. He then spilled combustible substance and set it on fire. "He wounded himself with a knife," the Investigative Committee specified.

Another schoolgirl was scared and jumped out of a window on the second floor. Two victims and the teenager himself were taken to hospital.

"The fire alarm system went off in the school. No one was injured in the fire," the committee added.

Investigators are working on the site. The issue of launching a criminal case is pending.

The administration of school number 1 confirmed the attack to TASS, but declined to comment. "It did happen. We are not commenting anything yet: the Investigative Committee and the whole city administration are working here now," a school official said.

It was earlier reported that four people have been taken to hospital after the attack.

"According to our information, four injured people were taken to a hospital in the city of Sterlitamak, three of them children. They are in grave condition. Updates on the injuries will be provided," Press Secretary of the republic’s Health Ministry Svetlana Kuskarbekova told TASS.