Bad weather on Mount Everest on Wednesday prevented retrieval of two bodies of climbers who died on mountain and the search for two who disappeared near the summit, expedition organisers said.

Most climbers have finished their attempts to reach the summit, but those still trying were having problems with the low visibility, wind and snow. Pemba Sherpa of the Seven Summit Treks agency in Kathmandu said a helicopter waited all day at base camp for weather to clear so it could fly to a higher camp. A Dutch climber’s body was brought to Camp 2 at 6,400 metres, while an Australian climber’s body is at Camp 3 located at 7,200 metres.

The Sherpas who are attempting to carry the bodies were struggling because of the weather condition.