The Wall Street Journal is reporting that US investigators believe the plane flew for four hours after losing contact.
"U.S. investigators suspect that Malaysia Airlines 3786.KU -4.08% Flight 370 stayed in the air for about four hours past the time it reached its last confirmed location, according to two people familiar with the details, raising the possibility that the plane could have flown on for hundreds of additional miles under conditions that remain murky."
"U.S. counterterrorism officials are pursuing the possibility that a pilot or someone else on board the plane may have diverted it toward an undisclosed location after intentionally turning off the jetliner's transponders to avoid radar detection, according to one person tracking the probe."
U.S. Investigators Suspect Missing Airplane Flew On for Hours
