According to satellite and radar evidence, he said, the plane then changed course and could have continued flying for a further seven hours.
He said the "movements are consistent with the deliberate action of someone on the plane".
The plane disappeared a week ago with 239 people on board.
Mr Razak stopped short of saying it was a hijacking, saying only that they were investigating "all possibilities".
He said the plane could be anywhere from Kazakhstan to the Indian Ocean.
The developments have added further uncertainty to the relatives of the 239 people on board the Kuala Lumpur to Beijing flight.
Some in the Chinese capital said the news had made them more hopeful that their loved ones are alive, but one woman said they were on an emotional rollercoaster and she felt "helpless and frustrated".(bbc)
Post a Comment