An "electronic ping" was picked up from the Malaysia Airlines flight by satellites after the plane lost contact with ground control, Reuters reports. Meanwhile, US officials have been given an "indication" the plane crashed into the Indian Ocean.
Chinese scientists have claimed satellite images of unknown objects in the ocean may be related to the disappearance of the missing flight MH370.
The images will only increase the speculation on the whereabouts of the flight, carrying 239 people, which disappeared in the early hours of Saturday.
Authorities have been unable to establish what happened, while the search area has been extended.
A mother has described her frustration as she waits for answers on the fate of her missing son who is on board the missing Malaysia plane.
Malaysia's military believes a jetliner missing for almost four days turned and flew hundreds of kilometres to the west.
The wife of a passenger travelling on the missing Malaysia Airlines flight has spoken of her struggle to cope as she waits for news.