Malaysia's civil aviation chief has said the fate of a missing Malaysia Airlines jet remains "a mystery".

Azharuddin Abdul Rahman said officials had not ruled out hijacking as a cause of the plane's disappearance.

He said all reported sightings of debris from the plane in the seas south of Viet Nam were unconfirmed.

Relatives in Kuala Lumpur and Beijing are desperate for news of their loved ones

Malaysia Airlines flight MH370 vanished from radar almost three days ago en route to Beijing from Kuala Lumpur, with 239 people on board.

Relatives of the missing passengers have been told to prepare for the worst.

(Source: BBC)