Kenyan Airways confirmed that the Nairobi-bound airliner that was lost after issuing a distress signal shortly after takeoff from Cameroon has been found after a two full days of searching.

The crash site of the Boeing 737-800 was in a mangrove swamp, 20 kilometres southwest of Douala, a business centre on the Cameroon coast.

The discovery was made after the search for the aircraft was extended to a second area in swamplands north of Douala.

An official said Monday none of the 114 people aboard a Kenya Airways flight survived its crash.

"There are no chances that there will be any survivors because almost the entire body of the plane was buried inside the swamp," said Jean-Pierre Nana, director of Cameroon's Civil Protection Department, quoted by Reuters.

The aircraft originally took off Friday from Abidjan the Ivory Coast and made an interim stop at Douala. The final leg to Nairobi was delayed about an hour by heavy rain, finally taking off shortly after midnight.

Within 15 minutes of takeoff, the pilot sent a distress signal, but air traffic controllers were unable to reach the flight crew.