Police in Indonesia say they have foiled a potential attack on a group of Christian worshippers in the Muslim majority nation.

Five homemade bombs were found in the mouth of a cave in Yogyakarta province where hundreds of worshippers were due to gather late Thursday. Two similar bombs were found at a nearby police post.

The explosives were gasoline-filled bottles linked to detonators and timers.

Catholics gather once a month to the cave in Sleman district where there was once a reported sighting of the Virgin Mary.

Indonesia has a long history of religious tolerance, but a small extremist Islamic fringe has become more vocal and violent in recent years.

So far, authorities have no suspects in the planned attack.