HANOI, Vietnam (AP) — A doctor says 16 Vietnamese military personnel have been killed in a helicopter crash close to Hanoi, the capital.

The official Vietnam News Agency says the Russian-made chopper crashed Monday about 15 minutes after takeoff on a parachute training exercise. A doctor at a military hospital says 16 people were killed and five others were being treated for injuries.

He didn’t give his name because he wasn’t authorized to speak to the media.