5324286-3x2-700x467Two objects spotted by satellite in the southern Indian Ocean may be debris from the missing Malaysia Airlines Flight 370, Australian authorities said Thursday, fueling cautious hopes of a breakthrough in an international search of unprecedented scale. A Royal Australian Air Force search plane dispatched to the remote spot was unable to find either object amid rain, clouds and limited visibility Thursday afternoon, the Australian Maritime Safety Authority said on Twitter. Three more planes, a merchant ship and an Australian naval ship were on their way to the scene, officials said. Authorities cautioned the objects could be something else — shipping containers that fell off a vessel, for instance. But they said they represent the best lead so far in the search for the missing airliner, which vanished 13 days ago with 239 passengers and crew aboard. MORE