RIA Novosti quoted the head of the Udmurt Republic, Aleksandr Brechalov as saying that as 13 deaths in the incident, another 23 people, including 20 children, were wounded.
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The incident took place during a lesson in one of the schools of Izhevsk on Sept. 26. A man in black clothes broke into the classroom and opened fire at the children.
Russia's Investigative Committee said the criminal, born in 1988, was a graduate of this school.
According to the latest information, the shooter committed suicide after the attack.