Malaysia plane: Families told missing flight lost
24 March 2014 Last updated at 14:17 GMT
Malaysia Airlines has said it now has to assume "beyond any reasonable doubt" that missing flight MH370 has been lost and there are no survivors.
The announcement came in a text message, seen by the BBC, that was sent to families of those on board.
Malaysian Prime Minister, Najib Razak, said: "It is with deep sadness and regret, that according to this new data, flight MH370 ended in the southern Indian Ocean."