Authorities in Nepal will use DNA to help identify the bodies of four climbers who failed their Everest challenge.
"The bodies are not in a recognisable state, almost down to their bones. There is no face to identify them," a senior official said.
"We have directed the hospital to collect DNA samples so they can be matched with any families who come forward."
Nepalese authorities, who control the world's tallest peak, had retrieved the bodies between the Everest base camp and the South Col at 25,938 feet during a clean-up operation.
They were unable to verify how long the bodies had been on the slopes.

Russian ballistic missiles kill at least five in Ukraine's Kyiv, spark fires
Kenya tourist helicopter crash kills seven
US, South Korea to cut length, scope of military drills after Trump order
Central African Republic gold mine collapse kills at least 100
Israeli airstrike kills nine Palestinians at Gaza police station