Bulgarian climber dies on K2 expedition
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Seven Summit Treks -- a trekking company leading the expedition -- said Atanas Skatov, 42, fell as he was changing ropes during his descent to basecamp.
"[It] seems some errors occurred and he fell down. We had fixed the mountain with new ropes" which were not broken, Seven Summit Treks said in a statement.
The Alpine Club of Pakistan also confirmed the incident, saying his body was later recovered and flown by a Pakistani military helicopter to the nearby city of Skardu.
"We pay homage to the strength and spirit of our climber -- his feat and his relentless will to (reach) the top will never be forgotten!" the Bulgarian foreign ministry said in a statement.
A third climber -- Russian-American Alex Goldfarb -- also died on a nearby mountain during an acclimatising mission ahead of a bid to scale Broad Peak in January.
K2 is known as the "Savage Mountain" because of its punishing conditions: winds can blow at more than 200 kilometres per hour (125 miles per hour), and temperatures can drop to minus 60 degrees Celsius (minus 76 Fahrenheit).
With Pakistan's borders open and with few other places to go, this winter an unprecedented four teams totalling around 60 climbers have converged on the mountain, more than all previous expeditions put together.
Unlike Mount Everest, which has been topped by thousands of climbers young and old, K2 is much less travelled.