The helicopter crashed and caught fire but the four on board - all Nepalese citizens - managed to escape. One was critically injured and was flown by rescue helicopter to Katmandu for treatment.
The tiny airstrip at Lukla, carved out of the side of the mountain at an altitude of 2,843 meters (9,325 feet), has earned a reputation as one of the most extreme and dangerous airports in the world. The single runway is narrow, short and sloped.
The helipad is also small.
It has become a busy airport used by thousands of mountaineers and trekkers who visit the Everest region every year.
Lukla is small airstrip on the foothills of Mount Everest.