A grenade exploded Wednesday outside a mosque in Indonesia's eastern town of Ambon in Mauluk province, just before Muslims performed the pre-dawn prayer. No casualty was caused.

The bomb disposal unit said the explosion came from a hand grenade after finding a pulled-out grenade pin near the Al Fatah Mosque in Ambon, which already saw years of sectarian clashes between Muslims and Christians culminating in 1999-2001.

"We found a grenade pin at the scene," Maluku police chief Gatot Guntur Gunawan was quoted by leading news website Detikcom as saying.

He said police had collected information from at least four witnesses but was unable to immediately name any suspect.

Source: Xinhua