Australian Prime Minister Tony Abbott said at a press conference that satellites have found objects about 2,400 kilometers (1,500 miles) off the coast of Perth. 

He said he was optimistic that investigators will find out the fate of Malaysia Airlines Flight 370, which disappeared on March 8 after it took off from Kuala Lumpur en route to Beijing, China, with 239 people on board. He noted that more planes are searching for any sign of the plane than ever before. 

"Obviously, the more aircraft we have, the more ships we have, the more confident we are of recovering whatever material is down there," Abbott said. "And obviously, before we can be too specific about what it might be, we do actually need to recover some of this material. We have now had a number of very credible leads, and there is increasing hope ... that we might be on the road to discovering what did happen to this ill-fated aircraft."

Malaysian authorities now believe the plane was deliberately diverted by someone on board, CNN reported