The revelation could provide searchers with a focus that has eluded them since the plane disappeared with 239 people aboard just hours after leaving Kuala Lumpur for Beijing early Saturday. Since then, the search has covered 35,800 square miles (92,600 square kilometers), first east and then west of Malaysia and even expanded toward India on Wednesday.
The Chinese sighting, if confirmed, would be closer to where the frantic hunt started.
The Xinhua report said the images from around 11 a.m. on Sunday appear to show "three suspected floating objects" of varying sizes in a 20-kilometer radius, the largest about 24-by-22 meters (79-by-72 feet).
The images originally were posted on the website of China's State Administration of Science, Technology and Industry for National Defense. That site reports coordinates of a location in the sea off the southern tip of Vietnam and east of Malaysia.
