New details have emerged on the Malaysia Airlines jetliner with 239 people on board that went missing on Saturday.

Officials now suspect two passengers aboard were possibly traveling under stolen passports, raising questions of foul play.

Luigi Maraldi, an Italian national whose name appears on the missing plane's passenger manifest is alive and well, on vacation in Thailand.

He says his passport was stolen in 2013.

Search teams like this one from Singapore continue looking for signs of the missing aircraft.

Malaysia Airlines Flight 370 disappeared about an hour into its flight.

It's presumed to have crashed off the coast of Vietnam.

On Sunday, a senior source said that investigators were narrowing their focus on the possibility that the plane disintegrated in mid-flight.

The plane's sudden disappearance makes this one of the rarest aviation disasters.