Images of a hillwalker last seen on Monday have been released in an effort to trace him amid increasing concerns for his welfare.
An urgent search was launched for Ross Kinghorn after he was last seen boarding a train from his hometown of Linlithgow to go walking in Perthshire.
There have been no other confirmed sightings of the 57-year-old since he was captured on CCTV on January 16.
He is believed to have gone hillwalking in the Bridge of Tilt area on the outskirts of the Cairngorms National Park.
He is described as a white male, 5’8” tall, slim build, bald head and is believed to be wearing a blue beanie hat, blue waterproof jacket, green fleece, grey walking trousers and brown boots.
He is also believed to be in possession of a small two-wheel trolley and a small black rucksack.
Inspector Kris McCall said: “As time passes we are becoming more concerned for Ross. We are carrying out extensive searches and reviewing CCTV in an effort to trace him.
“Ross has been seen on CCTV using the rail network on Monday but unfortunately there have been no other confirmed sightings of him.
“Today we have issued a second photograph of Ross which shows the clothing he was wearing when he was last seen. We hope it may help people recognise him.
“I would ask residents in the Bridge of Tilt area to check their sheds and outbuildings for any sign that he may have been there.
“I would also appeal to any hillwalkers who have visited Bridge of Tilt recently and may have information to contact police as soon as possible.”
Anyone who may have seen Ross is asked to contact police on 101 quoting 1588 of January 20, 2023.