Police have drafted in a helicopter to help search for a missing hillwalker in the Highlands.
Finn Creaney, 32, from the Tain area, was last seen at around 2.15pm on Friday, March 25.
He went missing after being dropped off at Loch Naver on the B873 public road in Sutherland to start his planned walking route.
Police say that Mr Creaney planned to walk the route around Loch Naver and South to Golspie where his vehicle was situated.
Searches are ongoing in the area with the assistance of Assynt MRT and on Thursday morning, the Police Scotland Air Unit confirmed it has launched a helicopter to join the hunt.
Mr Creaney is described as being 5ft 11, of slim build with light complexion and freckles on his arms and nose.
He has long brown hair down to his lower back and a full brown beard which is short in length.
When last seen, Mr Creaney was wearing a black t-shirt, a long brown leather jacket which goes down to his knees, dark coloured trousers, brown waterproof boots and was carrying a green rucksack.
Sergeant Mike Gallie, of Easter Ross and Sutherland Policing Team, said: “We are growingly increasingly concerned for Finn as this is out of character for him.
“I would urge anyone who believes they may have seen Finn or spoken to him at any time since he was last seen in the area to get in touch with officer.
“Anyone with information should call 101, quoting reference 0912 of March 28.”