The passenger jet with 239 people on board went missing enroute from Kuala Lumpur to Beijing on Saturday.
According to ChinaDaily, a source said that the fact that they were unable to find any debris so far appeared to indicate that the aircraft might have disintegrated at around 35,000 feet.
The search teams deployed to find any debris in the ocean returned without any conclusion about the presumed crash due to reports of oil slicks in the sea south of Vietnam and east of Malaysia.
The source said that had the plane plunged intact from close to its cruising altitude, breaking up on impact with the water, the search teams would have been able to find a fairly concentrated pattern of debris.
Meanwhile, Interpol confirmed that two passengers on the flight had used stolen Austrian and Italian passports, raising suspicions of foul play.
Possibilities of hijack or a bomb explosion have not been ruled out yet, as the investigations are still on, the report added.