An expedition organizer says a 35-year-old Dutch man suffering from high-altitude sickness died on his way back from Mount Everest's summit.

Pasang Phurba of the Seven Summit Treks agency in Kathmandu says Eric Arnold died near the South Col on Friday night, and that attempts were being made to bring down his body.

Phurba said Saturday that Arnold had enough bottled oxygen with him as well as climbing partners, but that he complained of getting weak and died before he was able to come down to a lower altitude.

Arnold was from the Dutch city of Rotterdam, according to his Twitter account.

Hundreds of climbers have scaled the 8,850-meter (29,035-foot) peak since last week because of favorable weather conditions on the world's highest mountain.