Climbing Mount Everest this season is "almost impossible" because the routes have been damaged by avalanches triggered by last month's earthquake, officials in Nepal say.
They warn that it will take time for the routes to be remade. The government has not announced an official decision.
At least 19 people were killed in the avalanches.
The 7.8-magnitude earthquake is now known to have killed more than 7,000 people and injured more than 10,000.
Most climbers have now left the Base Camp and abandoned their expeditions, Sherpa porters based there have told the BBC.