Violence flared again near the Freeport gold mine in Indonesia's Papua province as gunmen shot and wounded two of the company's employees, police said on Tuesday.

The injured men were in stable condition after being taken to a hospital, said police spokesman Agus Rianto. One was shot in the thigh and arm and the other was hit in the hand and waist while traveling on a security-escorted bus carrying 60 employees, he added.

"A group of unidentified men ambushed Freeport's bus," said Rianto "Police are still searching for the perpetrators who ran into the dense jungle."

Freeport has been targeted by a string of shootings since mid-July that have left three dead and injured more than 20 people. Police arrested several suspects for earlier ambushes, but it is unclear who is behind the violence.

The sprawling Grasberg mining complex, run by a subsidiary of the Phoenix-based Freeport-McMoRan Copper and Gold Inc., has long been a source of tension in Papua, a remote and underdeveloped region that is also home to a low-level insurgency seeking independence from the government.

"The incident will not effected our mining production and operations, and we continue to fully support and cooperate with the police investigation," Freeport's Indonesian spokesman Mindo Pangaribuan said.