Teens injured after detonating explosive in high school in Dagestan KARATA, Russia, May 20 (UPI) -- Two teenagers were injured after detonating an explosive inside a high school in Russia's North Caucasus' republic of Dagestan, officials said Monday. A spokesman for the North Caucasus regional emergencies center told ITAR-Tass the explosion took place about 12:20 p.m. Monday in Karata. Two pupils shirked classes in physical culture. Having locked themselves in an empty classroom, they closed the detonator of an explosive device to a mobile phone battery, which caused a blast," the spokesman said. The teenagers -- both boys -- suffered wounds to their faces, hands and chests and were transported to a local hospital, the spokesman said. No fire followed the explosion. The building of the school was not damaged," the spokesman said.