Police have issued CCTV images of missing man Calum Mackenzie from the day he was last seen.
The 41-year-old was last seen at around 1.45pm on November 7 in the Dalmore area of Alness.
Officers have established Mr Mackenzie visited the Morrisons store on Dalmore Road at 1.27pm earlier that day. Here he purchased food items and left the store on foot.
Searches have been continuing in the Alness and Invergordon areas, with partners including the local coastguard, RNLI, mountain rescue teams and the local community assisting officers.
Inspector Alasdair Goskirk of Alness Police Station said: “We are continuing to work to establish Calum’s movements from when he was last seen and would ask that members of the public review the CCTV images to see if they recall seeing Callum.
“The images show the clothing we believe Calum to be wearing when he was last seen, which are a black jacket, a light blue shirt, black jeans and black boots.
“It has now been over four days since Calum has last been in contact, or seen, his family. They, along with officers, are understandably worried for his safety. We’d continue to appeal to anyone who has seen Callum, or has any information on his current whereabouts, to contact police as soon as possible.”
Those with information are asked to contact Alness Police Station via 101, quoting incident number 3129 of Friday, 8 November, 2019.
He is described as white, 6ft in height, stocky build, bald and has a tattoo on his left forearm. Officers do not believe he has access to a vehicle and will likely be travelling on foot or by public transport.
Meanwhile almost 1,000 photographs taken by a specialist charity gyro-helicopter in the search for a missing Highland man are being examined.
The services of SkyWatch Civil Air Patrol, based at Inverness Airport , were called in during the hunt for Mr Mackenzie
Deputy chief pilot Peter Mackintosh said: “We take high-quality digital images, and in this case took 980 individual images of the Cromarty Firth plus video footage.
“We take these back and examine them, blow up the images to the extent we can see a milk bottle. This process will take up to 24 hours.”