Malaysian authorities are probing new information that the missing plane flew at a very low altitude to avoid detection by radar.

The plane with 239 people on board reportedly dropped to an altitude of 5,000 feet or possibly lower to evade radar detection after it turned back midair.

Media reports said, investigators are poring over the Boeing 777 flight MH370 profile to find out whether it had flown low and used terrain masking during most of the eight hours it was missing from the radar coverage of possibly at least three countries.

Officials said the person, who had control over the aircraft has a solid knowledge of avionics and navigation, and left a clean track.
He said it passed low over Kelantan. The officials said this type of flying is considered very dangerous. Air sickness could easily set in.

Meanwhile, Malaysia's transport minister said searches have started in two air corridors for missing flight MH370.

The plane was intentionally diverted and could have flown on either a northern or southern arc from its last known position. Twenty-six countries have now been asked to help find the jet, which disappeared over a week ago with 239 people on board.

The airline believes the co-pilot spoke the final words to ground controllers.

Meanwhile, investigators are now looking into the possibility of suicide by the pilot or co-pilot of the missing Malaysia Airlines passenger.

Asked if suicide is being investigated by the police, Transport Minister Hishammuddin Hussein said yes.

A senior official said the co-pilot of the missing Malaysia Airlines flight is most likely to have made the final spoken communication with air traffic control in Kuala Lumpur before the aircraft disappeared from radar.

The co-pilot on the plane was 27-year-old Fariq Abdul Hamid.

Australia has joined the effort to locate the missing plane and leading the search in the Indian Ocean.