This handout photo received on Sunday shows officials of Freeport Indonesia inspecting the tunnel in Timika at the Grasberg mine, one of the world's biggest gold and copper mines high in the mountains of rugged Papua province. Twelve workers have been confirmed dead after a mine tunnel collapse in eastern Indonesia, but 16 others are still unaccounted for five days after the accident, the US operator Freeport McMoRan said on Sunday. Photo: AFP