A helicopter has been called in to join the search for missing Scot Shaun Banner, whose family say they are now in "stage of desperation".
Police Scotland Air Unit assisted in further searches of Dingwall and Cromarty Firth today, three days after Shaun vanished.
Shaun, 34, was last seen in Invergordon in the Highlands in the early hours of Saturday morning.
Family-organised searches have been taken place since Saturday but so far there has been no new leads on Shaun's whereabouts.
Police say the last known sighting of the dad was close to the Easter Ross town's railway station shortly after midnight on April 23.
In an update on social media, brother Alan Banner said the 34-year-old had "not been himself" in recent times.
Alan said on Facebook: "We are at a stage of desperation in the search for Shaun.
"Our family is incredibly worried, Shaun has not been himself lately and we are worried about his state of mind and just want to know he is safe.
"Sharing Shaun’s picture is important so please continue to share far and wide. Reminding people constantly of what he looks like and that he’s not been found yet.
"Equally speak about him, let people know he is missing; your elderly relatives, your neighbour without social media, anyone who could potentially not even know Shaun’s missing but could be holding an important piece of the puzzle if they have seen him.
"We are relying on people knowing Shaun is missing to get any information of his whereabouts."
Shaun is described as 5ft7, with short brown hair, blue eyes and of slim build.
He was last seen wearing green and brown ‘Crofter’ work trousers, a grey ‘Rogue Attitude’ puffer style jacket, blue ‘RSE’ work top and grey, purple and blue Nike Air max trainers.
Sergeant Claire Mackenzie from Alness Police Station said: “We’re becoming increasingly concerned for Shaun’s welfare as he has not been in touch with friends and family.
“Anyone with information regarding Shaun’s whereabouts or welfare is asked to contact police via on 101 quoting incident 2300 of 23 April 22 or Crimestoppers 0800 555 111.”
