Markus Makur, Timika, Papua – Papua Police are cooperating with the military as they begin hunting for gunmen responsible for a shooting incident that wounded two employees of US mining company PT Freeport Indonesia in Mimika, Papua.

Papua Police chief Insp. Gen. Bagus Ekodanto said Wednesday the unidentified gunmen were very mobile.

Two miners were wounded when three security-escorted buses were ambushed between mile 41 and mile 42 of a road leading to the Grasberg mine, the world's largest gold and copper mine.

Bagus said they were having difficulty with the terrain in the area where the shootings occurred.

The area is notorious for ambushes. Earlier this year, a 29-year-old Australian, an Indonesian security guard working for Freeport and a policeman were killed in separate attacks. In 2002, two American teachers and their Indonesian colleague were killed on the same stretch of road.