Australia is taking control of the “southern vector” search for the missing Malaysian Airlines jet, Australian PM Tony Abbott says.
According to Malaysian officials, flight MH370 was intentionally diverted and could have flown on either a northern or southern arc from its last known position.
More than 20 nations have been asked to help search for the missing jet, and evaluate radar and satellite data.
There has also been scrutiny of the last communication from the plane.
Malaysian officials said on Sunday that the last words from the cockpit – “All right, good night” – came after the Aircraft Communications Addressing and Reporting System (ACARS), which transmits key information about the plane to the ground, had been deliberately switched off.
On Saturday, Malaysian police searched the homes of Captain Zaharie Ahmad Shah and co-pilot Fariq Abdul Hamid. A flight simulator taken from the captain’s home was being re-assembled and examined at police headquarters, officials said.
Friends of both pilots – who investigators say did not ask to fly together – have expressed disbelief at the possibility of their involvement.
Investigators are also looking at passengers, engineers and other ground staff who may have had contact with the aircraft before take-off in their search for clues.
Malaysia Airlines plane, carrying a total of 239 passengers and crew, left Kuala Lumpur for Beijing at 00:40 local time on March 8.
The plane disappeared off air traffic controllers’ screens at about 01:20, when it was over the South China Sea.
Malaysian officials said on Saturday that according to a military radar, the aircraft then turned and flew back over Malaysia before heading in a north-west direction.
A satellite was able to pick up a signal from the plane until 08:11 local time, although it was unable to give a precise location.
Investigators are now looking at two possible corridors – a northern corridor stretching from the border of Kazakhstan and Turkmenistan through to northern Thailand, and a southern corridor stretching from Indonesia to the southern Indian Ocean.
Australian PM Tony Abbott said he was adding more resources to the search in response to a request from Malaysia.
Tony Abbott told parliament on Monday that Malaysian PM Najib Razak asked Australia to “take responsibility for the search on the southern vector, which the Malaysian authorities now think was one possible flight path for this ill-fated aircraft”.
“I agreed that we would do so. I offered the Malaysian prime minister additional maritime surveillance resources which he gratefully accepted.”
Malaysia’s navy and air force were also deploying assets to the southern corridor on Monday, Malaysia’s transport ministry said.
Meanwhile, Kazakhstan’s Civil Aviation Authority said it was not possible for the plane to have reached its airspace undetected.
Pakistan’s Civil Aviation Authority said it had checked its radar recordings but “found no clue” connected to the flight.
Aside from Australia, Malaysia has sent diplomatic notes requesting assistance to 25 countries.
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