The Malaysian official said only a skilled aviator could navigate the plane the way it was flown after its last confirmed location over the South China Sea, and that it appeared to have been steered to avoid radar detection.
The official said it had been established with a “more than 50 percent” degree of certainty that military radar had picked up the missing plane after it dropped off civilian radar.
Why anyone would want to do this is unclear. Malaysian authorities and others will be urgently investigating the backgrounds of the two pilots and 10 crew members, as well the 227 passengers on board.
Some experts have said that pilot suicide may be the most likely explanation for the disappearance, as was suspected in a SilkAir crash during a flight from Singapore to Jakarta in 1997 and an EgyptAir flight in 1999.
A massive international search effort began initially in the South China Sea where the plane's transponders stopped transmitting. It has since been expanded onto the other side of the Malay peninsula up into the Andaman Sea and into the Indian Ocean.
The plane had enough fuel to fly for at least five hours after its last know location, meaning a vast swath of South and Southeast Asia would be within its reach.
Investigators are analyzing radar and satellite data from around the region to try and pinpoint its final location, something that will be vital to hopes of finding the plane, and answering the mystery of what happened to it.
