Forensic experts conducting autopsies on the bodies of hikers killed in a Himalayan blizzard that has so far accounted for 29 deaths and 150 missing, said on Friday that initial examination suggested the trekkers died from suffocation and asphyxia.
At least 150 people were injured. A lack of records has made it difficult to calculate the number of missing Nepalis.
Meanwhile, Nepal's prime minister has promised to set up an early weather warning system after the latest accident raised concerns that amateurs were ill prepared for such expeditions.
Nepal's government blamed poor weather forecasts and lax regulation after the storm struck at high altitude on the edge of the Tibetan plateau, close to the world's 10th highest mountain, stranding scores of foreign tourists and Nepali guides in waist-high snow with little shelter.