On Saturday, the Vietnamese government said it had spotted two oil slicks off the southern coast of the country that could be from the missing Malaysia Airlines flight that vanished somewhere between Vietnam and Malaysia.

However, a Malaysian official said today that oil slick found in the sea is not from Malaysia Airlines 777, although originally thought to be consistent with the kinds that would be produced from the jet fuel of a crashed plane.

The plane disappeared over the South China Sea with 239 people on board.

Several countries, including the U.S. and China, have joined the search for the missing plane.