Foreign climbers and Sherpas on Mount Everest are concerned about the increasing theft of oxygen bottles from high camps.
They say it could threaten the lives of mountaineers because they each have a set supply for weather and traffic-related delays, as well as for the descent.
The concerns have been raised as the last groups of mountaineers wait for the weather to clear for their final push to the summit.
Experts say crowds of mountaineers, with many inexperienced climbers and unqualified guides, have also contributed to the situation.