Perth/Kuala Lumpur: Suspected floating debris of the Malaysian jet may have sunk in a remote part of southern Indian Ocean as a multination team failed to spot them, dashing hopes of a breakthrough in locating the aircraft which mysteriously disappeared two weeks ago.

Five surveillance aircraft and a ship deployed to trace the Malaysia Airlines Flight MH370 with 239 people on board after two large objects were seen in satellite imagery nearly 2,500 kilometres southwest of Perth, scoured the area but found nothing.