DHAKA: Despite the efforts of 34 planes, 40 ships and search crews from eight countries, officials have not found any sign of a Malaysia Airlines flight that went missing two days ago.

"Unfortunately, ladies and gentlemen, we have not found anything that appear to be objects from the aircraft, let alone the aircraft," Azharuddin Abdul Rahman, director general of the Malaysian civil aviation department, told reporters Monday.

So, more than 48 hours later, the mysteries surrounding Malaysia Airlines Flight 370 -- and the true identifies of some of its passengers -- remain intact, reports CNN.

Rahman discounted media reports that a plane door had been spotted.

"That report was not verified officially by the Vietnamese authorities," he said.

Another report said the plane`s tail had been found. That, too, is untrue, he said.

The only lead investigators have is an oil slick that a Vietnamese plane spotted, 90 miles south of Vietnam`s Tho Chu Island in the Gulf of Thailand.

The oil slick stretched between 6 and 9 miles -- and is being lab-tested.

No emergency signal has been detected by any search vessels or aircraft. And family members of passengers are being told to prepare for the worst.

"For the aircraft to go missing just like that ... as far as we are concerned, we are equally puzzled as well," Rahman said.

"We have to find the aircraft."

BDST: 1347 HRS, MAR 10, 2014