MOSCOW (AFP) - The United States spy wanted by Washington, Edward Snowden, did not emerge on Sunday with other passengers in the terminal after he landed in Moscow on a flight from Hong Kong, as some fellow travellers said he may have been whisked away directly from the airport tarmac.

Snowden was not among the passengers on the Aeroflot flight who emerged into the public area of Terminal F at Moscow's Sheremetyevo Airport after the flight from Hong Kong arrived on Sunday, an Agence France-Presse correspondent reported.

But some passengers told AFP they saw a car parked next to the plane after it taxied to the terminal building, leaving the possibility he may have been taken away separately from the other passengers.

"They were getting luggage straight from the plane into the car. It seemed a little strange. I saw three pieces of luggage," Aeroflot passenger Jason Stephens from the US told AFP.

AFP correspondents also said they saw a diplomatic car at VIP arrivals with an Ecuadorean flag. It was accompanied by an sport utility vehicle, also apparently from the embassy.

Snowden's final travel plans have not been confirmed, but a source within Aeroflot told Russian media he planned to head to Venezuela via Havana on Monday.

The Rossiya 24 state rolling news channel speculated the former operative could be spending the night at one of the South American embassies in Moscow.