The full investigation report into the disappearance of Malaysia Airlines flight MH370 will be released after the latest search efforts are completed, officials said on Thursday, four years after the aircraft first went missing. Flight MH370, carrying 239 people onboard, became one of the world's greatest aviation mysteries when it disappeared on its way from Kuala Lumpur to Beijing on March 8, 2014. Malaysia agreed in January to pay U.S. firm Ocean Infinity up to $70 million if it found the plane during an offshore search effort that is underway and expected to end in June.