School attacker (left) /

A Russian teenager attacked his fellow students and teachers at a school in the town of Sterlitamak, (Bashkortostan, Russia). 

The attacker was armed with a knife, reads the report on Mash Telegram channel. The assailant has set fire to one of the school classes during the attack.

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She is seriously injured, a Telegram user Breakingmash wrote.

A teacher was also injured, suffering severe knife wounds.

It is also reported that the attacker has attempted to commit suicide, slashing his own throat.

"The number of injured in the attack on the school in Bashkortostan increased to four people. The attacker, as well as two schoolgirls and a teacher, are among the injured," the report says.

The identity of the attacker has been established soon: a nine-grader Artem Tagirov.