Malaysia`s prime minister says investigators now know the missing Malaysian airliner's communications were deliberately disabled and that it turned back from its flight to Beijing and flew across Malaysia.
Razak Najib says authorities are now trying to trace the airplane across two possible ``corridors'' -- a northern corridor from the border of Kazakstan and Turkmenistan through to northern Thailand, and a southern corridor from Indonesia to the southern Indian Ocean.
Najib told a news conference this morning that the expanded search area is based on the latest satellite data.
An official involved in the investigation had earlier said that investigators had concluded the jet had been hijacked -- either by one of the pilots or someone else.
Najib, however, would not go that far -- saying no scenario for what happened to the plane had been ruled out.
The jet vanished a week ago on a flight from Kuala Lumpur to Beijing with 239 people onboard -- including two Canadians.