Satellite images of possible debris from the missing Malaysia Airlines flight MH370 have been released on a Chinese government website.
The three images show what appear to be large, floating objects in the South China Sea. Previous sightings of possible debris have proved fruitless.
The China-bound plane went missing on Friday with 239 people on board.
It vanished about an hour after it took off from Kuala Lumpur as it flew south of Vietnam's Ca Mau peninsula.
No distress signal or message was sent.
The three images are:
The images were taken on Sunday, a day after the plane disappeared, but were only released on Wednesday on the website of China's State Administration for Science.
Map co-ordinates place the objects in the South China Sea east of Malaysia and off the southern tip of Vietnam.
China's official Xinhua news agency says the largest of the objects measures about 24m x 22m (78ft x 72ft).
Separately, Agence France-Presse quoted US officials as saying that US spy satellites had detected no sign of an explosion in the area at the time. The system has detected such heat signatures in the past but none was discovered this time, the officials said.