A soldier killed two officers while firing his gun during a training exercise, military officials said Friday.

Alexei Alyokhin, stationed in Kovrov in the Vladimir region, was detained after the shooting, Colonel Vitaly Gusak said.

He said Alyokhin fired his automatic rifle beyond the boundaries of the shooting range, striking three officers. Two later died of their injuries.

Gusak said authorities were investigating whether the shooting might have been an accident.