Dozens of workers are trapped underground after a tunnel caved in at a giant US-owned gold and copper mine in Indonesia's eastern-most province of Papua, police said.
Papua police spokesman Lieutenant Colonel Gede Sumerta Jaya said the accident happened at the Grasberg mine in the Mimika district.
A search is under way but the fate of up to 30 trapped workers remained unclear, he said.
The mine is owned by Freeport-McMoRan Copper and Gold, which is based in Phoenix, Arizona.
A written statement from PT Freeport Indonesia, a subsidiary which runs the mine, said a tunnel in the underground training area collapsed. It did not say how many workers were involved or whether there were injuries or fatalities.
The province holds some of the world's largest gold and copper reserves.