British and U.S. secret services are searching for possible criminal involvement in the disappearance of Malaysian Airlines flight MH370, reports today suggest. MI6 and the CIA have been helping Malaysian investigators look for reasons behind the Boeing 777 jet's disappearance after it lost all contact more than three weeks ago on its way from Kuala Lumpur to Beijing. Malaysia's Defence Minister Mr Hishammuddin Hussein said the two agencies were working with Chinese spy agencies to try to find out why the plane suddenly changed course and headed to the west with its 239 mainly Chinese passengers and crew.