Police in Wester Ross are appealing for help in finding a missing walker.
Martin Rhodes was reported missing in the Kinlochewe area.
The 46-year-old from West Yorkshire was last seen about 8.30am on Wednesday, and police were informed in the evening, prompting a search involving rescuers throughout Thursday.
Torridon Mountain Rescue Team and the RAF Mountain Rescue Service joined the hunt for the missing man who, Police Scotland said, may have planned to go walking locally.
A spokesperson said it is not known what Mr Rhodes was wearing but he is known to have been carrying a black rucksack.
Inspector Jamie Wilson said: “We are growing increasingly concerned about Martin’s wellbeing due to the passage of time since he was last seen.
“We would urge anyone with information which could help locate him to come forward as soon as possible.
“Martin is an experienced hillwalker and is familiar with the area.
“We working to establish what route he may have taken and so would urge anyone who believes they have seen him at any time since 8.30am on Wednesday to come forward.
“Anyone with information can contact police by calling 101, quoting incident 4582 of 1 May.”
Mr Rhodes is described as being 5ft 4in (1.63m) tall and of slight build with short brown hair.