The international team hunting Flight MH370 in the remote southern Indian Ocean returned on Saturday to an area where suspected debris was spotted by satellite earlier this week.
Six aircraft and two merchant ships are scouring the area, though Australian officials have cautioned the objects, one up to 24 meters (72 feet) in length, may not be related to the missing aircraft or might have sunk.
China, Japan and India are sending planes and Australian and Chinese navy vessels are steaming to the zone, more than 2,000km (1,200 miles) southwest of Perth.
Aircraft and ships have also renewed the search in the Andaman Sea between India and Thailand, going over areas that have already been exhaustively swept to find some clue to unlock one of the biggest mysteries in modern aviation.
Malaysian officials have been realistic about their ability to lead the operation with a global dynamic that some have said is beyond the country's technical capabilities and expertise.
Investigators suspect the Boeing 777, which took off from Kuala Lumpur for Beijing shortly after midnight on March 8, was deliberately diverted thousands of miles from its scheduled path. They say they are focusing on hijacking or sabotage but have not ruled out technical problems.