"Eight people including members of a South Korean expedition team have been killed in western Nepal apparently due to snowstorm", said police spokesman Sailesh Thapa.
Helicopter pilot Siddartha Gurung, who was among the first people to reach the site, said the area had been totally destroyed and bodies were scattered everywhere.
"A mountain expedition of five South Korean nationals and four foreigners were swept off by strong winds at the base camp during their climb to Mount Gurja".
'(They) fell off a cliff and died'.
"Base camp looks like a bomb went off", said Dan Richards of Global Rescue, a US-based emergency assistance group that will be helping with the retrieval effort.
A team that reached the site at 3 500 metres above sea level found seven bodies, Bir Bahadur Budha, deputy superintendent of police in Myagdi district, said.
He said: 'Everything is gone, all the tents are blown apart'.
It was the deadliest Himalayan accident since 19 people were killed at the base camp of Everest in 2015, after an avalanche set off by a devastating natural disaster.
The previous year, 16 Sherpas were killed on Everest when an avalanche swept through the Khumbu Icefall during the busy spring climbing season.
They were noted missing Friday when officials couldn't contact them, police said.
The rarely-climbed Mount Gurja sits in Nepal's Annapurna region, next to avalanche-prone Dhaulagiri, the world's seventh highest mountain.
The BBC reported that according to the Himalayan Database no one has stood on Gurja's summit since 1996.
The South Korean team were planning to scale the mountain via a never-climbed route, according to the Korean Alpine Federation.
Kim Chang-ho, from South Korea, who is the fastest person to reach the summits of the world's 14 highest mountains without additional oxygen, is believed by local media to be among the dead.
A rescue team Sunday began retrieving the bodies of nine climbers killed in a violent storm on Nepal's Mount Gurja, a freak accident that has left the mountaineering community reeling.