A Russian teenager attacked a group of younger students with an ax, injuring six people, before setting his school on fire.

Russia’s investigative committee said the attacker, a ninth-grader, attacked a group of seventh-grade students with an ax at a school just outside the Siberian City of Ulan-Ude, then set the room ablaze.

Five students and one teacher were injured in the attack. The attacker was detained and was now hospitalized after a suicide attempt.

Earlier this week, investigators opened a criminal case into a knife attack that injured fifteen people at a school in the city of perm. The case was initially reported as an assault by two masked men, but authorities later said it grew out of a knife fight between two students.