So many speculations about the missing Malaysian airline MH370, but Malaysian government official said people with significant flying experience could have turned off the flight's communication devices, meaning the plane could have flown for up to six hours after it was lost by satellite.
The representative said that hijacking theory was now 'conclusive', and police are now believed to be searching the home of one of the pilots.
While Malaysian Prime Minister Najib Razak refused to confirm that flight MH370 was seized, he admitted 'deliberate action' on board the plane resulted in it changing course and losing connection with ground crews.
He did, however suggest that actions on the plane could have resulted in the flight's communication's being cut off +18
He did, however suggest that actions on the plane could have resulted in the flight's communication's being cut off
Theories: Suspicions are increasing that flight MH370 was deliberately diverted, as evidence suggests it took a sharp turn to the west and headed out over the Andaman Islands, sources have claimed +18
Conclusion: Malaysian officials say flight MH370 could have been hijacked by one or several people with flying experience and deliberately diverted
If the plane did carry on flying for five hours it could have travelled 2,200 nautical miles +18
Changing course: Officials said radar data suggests the plane may have turned back and crossed over the Malaysian peninsula after setting out
Re-routed: Malaysian officials have said radar data suggests the plane may have turned back and crossed over the Malaysian peninsula toward the Andaman Islands after setting out on a northeastern path toward the Chinese capital +18
Re-routed: Malaysian officials have said radar data suggests the plane may have turned back and crossed over the Malaysian peninsula toward the Andaman Islands after setting out on a northeastern path toward the Chinese capital
It is not yet clear where the plane was taken, however Mr Razak said the most recent satellite data suggests the plane could have headed to one of two possible flight corridors.
One possibility is the northern corridor, which stretches from the border of Kazakhstan and Turkmenistan to northern Thailand, while the other is the southern corridor from Indonesia to the Southern Indian Ocean.
U.S. says missing Malaysian jet could be 'act of PIRACY': Evidence shows plane changed direction and climbed thousands of feet 'under command of a pilot' after tracking devices were manually disabled
Pilots who were flying missing Malaysian jet under police investigation amid fears the plane was hijacked by people with aviation training
The aircraft's fuel reserves mean it could have travelled as far as Pakistan, Sri Lanka or Australia in the other direction.
Mr Razak said authorities have not ruled out any possibilities in the international search for the plane and the 239 people on board.
'Clearly the search has entered a new phase. Over the last seven days, we have followed every lead and looked into every possibility,' Mr Razak said. 'For family and friends (of the passengers), we hope this new information brings us one step closer to finding the plane.'
As of Saturday, 14 countries, 43 ships and 58 aircraft are involved in the search, with Malaysia set to approach countries in the northern and southern 'corridors' where the plane was last believed to have been.
The Boeing 777's communication with the ground was severed just under one hour into the flight on March 8 from Kuala Lumpur to Beijing.
It has now been confirmed the plane turned back and crossed over the Malaysian peninsula after setting out on a northeastern path toward the Chinese capital.
Experts say signals from the plane shows it then continued flying for at least five hours in an unknown direction. The plane's messaging system and transponder were both deliberately cut off and with them all hopes of further tracking the plane.
American officials had been briefing Friday that the investigation was looking at 'human intervention' - one source even said it may have been 'an act of piracy'.
The disabling of the Boeing 777's transponder and messaging system occurred around 12 minutes apart. Such a gap would be unlikely in the case of an in-flight catastrophe and gave authorities the clearest indication to date someone on-board was behind it.
The motive of the hijack is still not clear. No demands have been made and no groups have publicly claimed involvement in the disappearance.
Two sources told Reuters an unidentified aircraft, which investigators believe was Flight MH370, was following a route between navigational waypoints - indicating it was being flown by someone with aviation training - when it was last plotted on military radar off the country's north west coast (file picture) +18
Gone: The Malaysian Airways jet (not pictured) vanished on March 8 after communication was severed just one hour into a flight from Kuala Lumpur to Beijing
Search effort: Colonel Do Duc Minh (far left) Vietnam Air Force's 370 Division's Chief of Staff, points at a map as he speaks to reporters about search flights aimed at finding the missing Malaysia Airlines plane +18
Search effort: Colonel Do Duc Minh (far left) Vietnam Air Force's 370 Division's Chief of Staff, points at a map as he speaks to reporters about search flights aimed at finding the missing Malaysia Airlines plane
Some experts have said that pilot suicide may be the most likely explanation for the disappearance, as was suspected in a SilkAir crash during a flight from Singapore to Jakarta in 1997 and an EgyptAir flight in 1999.
Malaysian authorities and others will be urgently investigating the backgrounds of the two pilots and 10 crew members, as well the 227 passengers on board.
Indeed Prime Minister Najib said they would be examined in his public statement.
The already global search effort will now be expanded along the two large corridors outlined in his speech. It is unclear how resources will be allocated but the Prime Minister said all the countries within those areas had been notified of the renewed focus.
The USS Kidd arrived in the Strait of Malacca late Friday afternoon. It uses a using a 'creeping-line' search method of following a pattern of equally spaced parallel lines in an effort to completely cover the area.
A P-8A Poseidon, the most advanced long range anti-submarine and anti-surface warfare aircraft in the world, will arrive Saturday. It has a nine-member crew and has advanced surveillance and reconnaissance capabilities, the department of defense said in a statement.