Police in Tasikmalaya, West Java, said they were investigating whether an attack on a mosque belonging to the Ahmadiyah minority Islamic sect in Kotawaringin village actually occurred.

Adj. Sr. Comr. Irman Sugema, the Tasikmalaya Police chief, said on Wednesday that his office was questioning several people in the case, including members of the sect.

Unknown attackers are reported to have ransacked the mosque in the early hours of Wednesday, but Irman said police were still looking for proof that the attack took place.

"The area now is clean, so we have to check whether anything was ever damaged to begin with," he said.

A joint police and military patrol has been posted to the mosque. The building is two kilometers from the nearest villagers' homes.