Gunmen stormed a helicopter and killed its New Zealand pilot shortly after it landed in Indonesia’s restive Papua region on Monday, and they released two health workers and two children it was carrying, police said.

Glen Malcolm Conning, a pilot for Indonesian aviation company PT Intan Angkasa Air Service, was shot to death by gunmen allegedly with the West Papua Liberation Army, the armed wing of the Free Papua Movement, after landing in Alama, a remote village in Mimika district of Central Papua province, said Faizal Ramadhani, a National Police member who heads the joint security peace force in Papua.

He said the gunmen released the Indigenous Papuan passengers and set fire to the plane.