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Washington - US investigators suspect that Malaysia Airlines Flight MH370 stayed in the air for about four hours past the time it reached its last confirmed location, the Wall Street Journal reported, citing two people familiar with the details.
The report comes as authorities remain uncertain about which ocean to search for the jetliner that went missing on Saturday after taking off from Kuala Lumpur.
It raises the possibility that the plane, and the 239 people on board, could have flown on for hundreds of additional kilometres under conditions that remain murky, the newspaper reported.
The last definitive sighting of the aircraft on civilian radar screens came shortly before 1.30am on Saturday, less than an hour after taking off from Kuala Lumpur, as it flew north-east across the mouth of the Gulf of Thailand bound for Beijing.
Aviation investigators and national security officials believe the plane flew for a total of five hours based on data automatically downloaded and sent to the ground from the Boeing 777's engines as part of a routine maintenance and monitoring program, the Journal said. - Reuters