Specialist search teams are working around the clock in the hunt for Newark man Ian Cree, who went missing more than three weeks ago.
Ian was reported missing at around 4pm on Saturday, January 20.
The 50-year-old is white, around 5ft 7ins tall, with short dark hair. He was last seen wearing dark jeans, a navy blue sweatshirt and walking boots.
Inspector Louise Clarke, neighbourhood policing inspector for Newark and Sherwood, said: "We are continuing to make a number of enquiries in our search for Ian and we have specialist search teams who are working 24/7.
"A section of the River Trent has been searched in Newark and we have a team of volunteers and officers who have been handing out leaflets in the area where Ian was last seen.
"We are also encouraging residents to check their gardens, outbuildings, sheds and any other places which may be hidden from general view.
"Ian's family have asked for privacy at this time, but are desperately appealing to anyone who may have seen him to call 101 - you may not feel the information is significant, but it could be hugely useful."