Malaysia Airlines says it has lost contact with a plane travelling from Kuala Lumpur to Beijing, with 239 people on board.
The airline said in a statement that flight MH370 disappeared at 02:40 local time on Saturday (18:40 GMT on Friday).
It had been expected to land in Beijing at 06:30 (22:30 GMT).
The plane went off the radar in Vietnamese airspace, according to a statement on the Vietnamese government website.
Its last known location was south of Vietnam’s Ca Mau peninsular although the exact position was not clear, it said.
HOW DOES A PLANE JUST DISAPPEAR. this is scary. and real.