Police say the pilot, who had been working in Nepal for 3 years, was caught 'red-handed' with two boys aged 12 and 14.
Sehingga kini 11 individu maut dalam pendakian tawan Gunung Everest sejak 10 hari lalu.
Annapurna is technically difficult and avalanche-prone and has a higher death rate than Everest.
A chopper pilot who is coordinating the retrieval mission says all nine bodies have been found and the team are in the process of bringing them down.
Nepal is seeking closer ties and much-needed energy and infrastructure investment from China, which has flexed greater economic and diplomatic muscle in its Himalayan neighbour in recent years.
During his earlier tenure, Oli had sealed deals with Beijing in 2016 to use Chinese roads and ports, seeking to reduce Nepal's dependence on India for trade and transit.
The US-Bangla Airlines flight had been flying from Dhaka when it crashed in a football field near Tribhuvan International Airport.
Himalaya Airlines, operating an Airbus 320, will service the Kathmandu-KL route five days a week.