A small aircraft veered off the runway and hit two helicopters while attempting to take off in Nepal's Lukla airport on Sunday, killing three people.
The plane, operated by Summit Air, was not carrying passengers at the time of the incident.
Officials said the cause of the incident was not immediately known.
"Two people died on the spot and the third one died while undergoing treatment in a hospital in Kathmandu," an airport official told Reuters.
Three more people are being treated for injuries at nearby hospitals.
Lukla, which is also known as the gateway to the Mount Everest.

At least 9 killed in hotel fire in India's Kolkata
Ebola cases in Congo exceed 5,000, government data shows
8 Israeli airstrikes hit Syria's Abu al-Duhur airbase, state TV reports
Indonesia earthquake death toll rises to 70, government aid arrives
China's torrential rains kill 10 in southwest as thousands evacuated
