In this file photo, a Russian-made MI-171 helicopter is being prepared to go on a new search for the missing Malaysia Airlines flight MH370 in Ca Mau.
Sixteen people were killed and five injured when a Vietnamese military helicopter crashed in the capital Hanoi early on Monday, a top military official said.
"The plane was carrying 21 people and it crashed during a parachute training exercise, killing 16 and injuring five others," Lieutenant General Vo Van Tuan, army deputy commander, told AFP.
The dead and injured were all military personnel, he added.