left kuala lumpur for beijing on friday afternoon on our time with 239 passengers on board but went completely off the radar shortly after takeoff. david piper live from bangkok with the latest. david? >> reporter: jenna, it has been nearly three days since that malaysia airlines jet went missing. as you said no trace of it. they are now extending the search to try to find the plane. hopes were raised earlier when the vietnamese military said its air cruisers spotted a rectangular shape in the water near its coast. perhaps a plane door or life raft. when the ships retrieved the object today, investigators said it wasn't from the aircraft. it had been found in the same area that oil slicks were cited on saturday. a sample of the oil was taken for laboratory analysis but it proved to not be jet fuel. malaysian officials say radar signals show the plane might have tried it turn back to malaysia for some reason before