Sydney - The underwater drone looking for traces of a missing Malaysian airliner has trawled 90 square kilometres of the Indian Ocean floor in an area where the Boeing 777 was believed to have crashed, but found no objects of interest, officials said Thur
Samples collected from an oil slick near the search site 2,170 kilometres north-west of Perth are still being analysed, a bulletin from the Perth-based search team said.
The submersible was sent down for the first time Monday after searchers gave up hope of hearing more signals that could come from emergency beacons.
Prime Minister Tony Abbott, speaking Wednesday, warned that the most promising locations for the Bluefin-21 submersible would be covered in about a week.
"If we don't find wreckage, we stop, we regroup, we reconsider," Abbott was quoted as saying by The Wall Street Journal.
Malaysian Airlines flight MH370 vanished an hour into a night flight March 8 from Kuala Lumpur to Beijing with 239 people on board, mostly Chinese nationals.