Malaysian Airline management believe that missing flight MH370 is assumed to have crashed leaving no survivors.

"Malaysia Airlines deeply regrets that we have to assume beyond any reasonable doubt that MH370 has been lost and that none of those on board survived," the ariline told the families of the victims.

"As you will hear in the next hour from Malaysia's prime minister, we must now accept all evidence suggests the plane went down in the Southern Indian Ocean."

Minuites after the message was made public, prime minister Najib Razak told a press conference that according to new satellite data there was no doubt the Boeing 777 carrying 239 people had plunged into southern Indian Ocean.

"I was briefed by representatives from the UK Air Accidents Investigation Branch," Razak said.

"They inform me that Inmarsat the UK company that provided the satellite data which indicated [the plane flew within] the northern and southern corridors, has been performing further calculation on the data.

"Using a type of analysis never before used in an investigation of this sort, they have been able to shed light on MH370's path.

"Based on the new anaylsis, Inmarsat and AAIB have concluded that MH370 flew along the southern corridor and that its last position was in the middle of the Indian ocean west of Perth this is a remote location far from any possible landing site.

"It is therefore with deep sadness and regret that I must inform you that according to this new data flight MH370 ended in the southern Indian Ocean," he said.