Investigators in the Krasnodar region are trying to determine the cause of an explosion that killed two boys and injured another in an agricultural field, police said Monday.
The regional branch of the Investigative Committee said an unknown device exploded about 500 meters from the village of Keslerovo on Saturday. One boy, 14, died at the scene. The other boys, both 12, were taken to a hospital, where one later died.
Investigators said the explosion was not connected to the flooding that has severely affected other parts of the region, Interfax reported.
They are currently considering the possibility that the explosion was caused by an undetonated World War II era shell.