A Vietnamese SU-30 fighter jet went missing while training offshore in the country's central Nghe An province on Tuesday morning, the media reported.
There were two pilots aboard the Russian-made fighter jet, Xinhua news agency reported.
The jet, which disappeared from radar screen at 7.29 a.m. (local time), took off from Sao Vang airport in Thanh Hoa province.
A local fisherman said he saw a plane falling down into the sea around 8.30 a.m. to the east of Mat island.
A search operation was initiated by a joint rescue team.
--IANS
py/vt