Officials said the gunman shot himself after the attack. He was not immediately identified.

MOSCOW, Russia — A gunman killed 13 people, including seven children, and wounded 21 others at a school in central Russia on Monday, authorities said.

Russia’s Investigative Committee said the shooting happened at a school in Izhevsk, a city about 960 kilometers (600 miles) east of Moscow in Udmurtia. Among the wounded are 14 children and 7 adults, the committee reported.

The governor of Udmurtia, Alexander Brechalov, said in a video message that a still-unidentified gunman shot himself.

Children from 1 to 11 grades study in the school. It was evacuated, and the area around it was cordoned off, the governor said.

According to the Investigative Committee, the shooter was wearing a black T-shirt with “Nazi symbols”. No other details about the shooter and his motives have been released.

Izhevsk, a city of 640,000 people, is located west of the Ural Mountains in central Russia.