Eight children among the dead in the attack of two assailants in the southwestern city of Kazan.
A school shooting in the southwestern Russian city of Kazan killed at least 11 people on Tuesday, most of them children, the RIA Novosti news agency reported, citing local emergency services.
Russian media said at least eight children were from the murders.
According to the Interfax news agency, two gunmen opened fire on the school and one of them, a 17-year-old man, was later arrested.
The other attacker died, Russian news agency Tass reported.
Local officials said some children were evacuated from the school, but others still remained in the building.
Authorities said additional security measures had been put in place at all schools in Kazan, the capital of the Tatarstan region, about 700 kilometers (430 miles) east of Moscow.
School shootings are relatively scarce in Russia, but there have been several violent attacks on schools in recent years, mostly carried out by students.