Glen Coe Mountain Rescue team has set out to reach a stranded hillwalker in Lochaber.
The man, who is believed to have ventured out alone, managed to call police on his mobile phone after getting into difficulty on 3,106ft (947m) Sgorr Bhan near Ballachulish.
A spokesman for the police said the walker was not thought to have been injured but that he had been having trouble descending the hill.
Police were contacted at 11.24am this morning.
Visibility in the area was said to be good and the walker was said to have found shelter.
The rescue team has set out on foot to reach him.
Rescue team searching for walker stranded in Highlands