Geneva - One person was killed on Friday in a shooting in the prayer hall of a Swiss mosque, police said.
The suspected killer was arrested at the scene in the northeastern city of Sankt Gallen, local police told AFP, without giving further details about the individual.
Officers were alerted at around 14:00 (12:00 GMT) that shots had been fired in the mosque.
At the scene, they detained one man who was in possession of a handgun and found another lying dead in the prayer hall.