The search for a missing Malaysian airliner stretched into its fifth day on Wednesday, with still no concrete evidence to explain what happened to the plane and the more than 230 people who were on board.
With no sign of the plane, the search area has been expanded to an area that stretches all the way from China to the Andaman Sea west of Thailand.
This, after Vietnam briefly scaled down its search operations after saying it had been getting mixed signals from Malaysia over the flight path of Flight 370.
Authorities continue to look for clues that may explain what happened.
"I think there is a lot of speculation right now, some claims of responsibility that have not been confirmed or corroborated at all. We're looking at it very carefully."
The Malaysian military says the plane was in the air for over an hour before it vanished from radar and had traveled about 500 kilometers off course.
It added that the plane's transponder and tracking devices were switched off after the plane veered off track.
Some experts speculate that there might have been a sudden electrical malfunction on the plane, pointing out that backup power would only last an hour.
Officials have not ruled out the possibility of pilot suicide, as transponder signals are controlled in the cockpit.
Adding to the confusion, a Malaysian newspaper quoted Malaysian air force chief Rodzali Daud on Tuesday as saying that military radar had tracked the missing plane to the Strait of Malacca.
Rodzali denies he ever made the comments.
Kim Hyun-bin, Arirang News.