Flight was transfered to HCM at position IGARI. But they never called. Comms and radar contact was lost in that area. Wx in the area was clear. Light chops at Fl370 and Fl390. clear wx all across vietnam. Lights across the country were vissible.
What ever happened, was very sudden. Accars data was lost at same time. Indicating a possible breakup in flight.
Both countries are fully capable of having SAR vessels in the area by lunch or early afternoon. News of wreakage should start to come in soon. The area in concern is covered by both countries military radars. Excact position would not be too difficult to locate.