O Hijacking not being discounted as search for missing Malaysia Airlines jet enters its third day<br /><br />Efforts are being intensified in the search for a Malaysia Airlines jet with 239 people on board which has been missing since Saturday.<br /><br />Reports of an oil slick in the waters off the southern tip of Vietnam suggest the plane has crashed but sightings of debris remain unconfirmed.<br /><br />What happened to flight MH 370 when it disappeared one hour into its journey from Kuala Lumpur to Beijing is still a mystery.<br /><br />Director General of the Malaysia Civil Aviation Authority Dato Azharuddin Abdul Rahman described the extent of the search operation:<br /><br />“Today, we have used a large number of assets, comprising of 34 aircraft, 40 ships, hundreds of men, thousands of man-hours has been deployed. And countries that assisted us include Vietnam China Singapore Indonesia USA Thailand Australia and the Philippines.”<br /><br />The authorities are investigating security breaches after Interpol confirmed that at least two passengers used stolen passports.<br /><br />Nothing is being discounted from a hijacking to a bombing to a catastrophic technical failure.<br /><br />Although the Boeing 777 has a good safety record the lack of debris so far would indicate the aircraft may have broken up mid-flight for some reason.