Fresh objects spotted by planes searching for a missing Malaysian passenger jet in a new area of the southern Indian Ocean have again raised hopes of unravelling the three-week old mystery.

Australian authorities coordinating the operation moved the air and sea search 1,100 km (685 miles) north on Friday after new analysis of radar and satellite data concluded Malaysia Airlines Flight MH370 traveled faster and for a shorter distance after vanishing from civilian radar screens on March 8.

Five international aircraft spotted "multiple objects of various colors" in the new search area some 1,850 km (1,150 miles) west of Perth, the Australian Maritime Safety Authority said Saturday. Some looked like they were from fishing boats and nothing could be confirmed until they were recovered by ships, it added.