MOSCOW - Russian news agencies are reporting that at least nine workers have been killed in an explosion at a mine in northern Russia.
State-run RIA-Novosti cites an unidentified law enforcement official as saying three people remained missing and six others were injured by the blast Thursday at a mine in the Murmansk region.
Interfax cites an unidentified emergency official as saying 12 people were killed and four injured.
According to RIA-Novosti, the mine belongs to a major company that produces a fertilizer component. It cites the law enforcement official as saying the blast happened while workers were conducting controlled explosions at the mine.