SLOVENIA ? A veteran Slovenian mountaineer has become stranded in the Himalayas during a solo climb, and bad weather is hampering rescue efforts, a colleague said Thursday.

Tomaz Humar last contacted his base team in Nepal on a satellite phone Monday to say he had been injured, and he has not been heard from since, Viki Groselj told The Associated Press. Groselj could not identify the injury, but Slovenia’s Delo newspaper, which also reported the event, said on its Web site that Humar had broken a leg.

In Katmandu, Nepal’s Department of Mountaineering could not immediately be reached for comment late Thursday night.

Groselj said Humar was believed to be stuck at an altitude of about 20,670 feet on the southern face of the 23,710-foot-high Langtang Lirung mountain in Nepal.