text: Bomb explodes at mosque in central Bulgaria . SOFIA 1996-12-06 A bomb exploded on Friday at a mosque in the central Bulgarian town of Kazanluk , causing damage but no injuries , state radio said . Violent crime has soared since the collapse of communism in 1989 as Bulgaria moves to a market economy . Bombings are often carried out by criminals to settle scores but the motive in this case was not immediately clear . Some residents of the Kazanluk area are Moslems who converted to Islam during Ottoman Turkish rule . The majority in Bulgaria are Christians . The radio quoted police as saying the blast broke windows and shattered the door of the mosque .