Two French soldiers were killed and another seriously injured by an accidental explosion at an ammunitions store at their military headquarters in divided Ivory Coast, the French army said on Saturday. "An inquiry is going on but we still don't know what triggered the explosion," said Colonel Henry Aussavy, spokesman for the French army in Ivory Coast. The bodies of the two male soldiers killed by the Friday explosion would be flown to France later on Saturday, he said. Ivory Coast has been divided in two since a civil war grew out of a failed coup in September 2002. French and United Nations peacekeepers police the ceasefire line that keeps the northern rebel-held zone and government-run south apart. Nine soldiers from the former colonial power were killed at their base in the rebel stronghold of Bouake in November when warplanes sent by President Laurent Gbagbo to attack rebel towns also bombed their military camp.