China has deployed ships to search new areas for the missing Malaysia Airlines plane, as Thailand said its radars may have tracked the flight shortly after it lost contact.
China has sent nine ships to waters south-east of the Bay of Bengal and west of Indonesia.
Teams from 26 countries are trying to find flight MH370, which went missing on 8 March with 239 people on board.
The entire search area is now roughly the size of Australia.
Malaysia says the plane, which was flying from Kuala Lumpur to Beijing, was intentionally diverted and could have flown on either a northern or southern arc from its last known position in the Malacca Straits.
Investigators are looking into the possibility that the aircraft's crew - or other individuals on the plane - were involved in its disappearance