Mohan Adhikari, general manager of the Katmandu airport, says the plane hit the airport boundary fence while landing at Lukla airport. Lukla is 185 miles (300 kilometers) east of Katmandu.
Adhikari says those killed in Wednesday's crash included 12 German tourists and two Swiss. The identity of one passenger killed in the crash was not immediately known.
Adhikari said a total of 18 people were on board. One Nepalese pilot survived the crash.