The official, speaking on condition of anonymity because he was not authorized to talk to the media, said 10 people remained unaccounted for in Monday's crash, AP reported.
The plane, a twin-propeller Bombardier Dash 8 flying from Bangladesh, swerved repeatedly before it crashed, landing near the runway.
A passenger plane from Bangladesh crashed and burst into flames as it landed Monday at the Kathmandu airport in Nepal, killing at least a dozen people, officials and witnesses said.
The twin propeller plane, a Bombardier Dash 8, can carry about 70 passengers, though it was not immediately clear how many people were on board.
At least 12 bodies have been recovered, according to an AP journalist who arrived at the scene soon after the crash and saw the US-Bangla Airlines plane broken into several large pieces, with dozens of firefighters and rescue workers clustered around the wreckage.
An airline official said some injured passengers had been taken away by ambulance.