Police are hunting a prisoner they believe may have escaped from a prison in Cumbria.
Dean Walker is currently "unaccounted for" within HMP Haverigg, Cumbria Police said. Officers and prison staff have been searching for him since he was reported missing within the grounds at 11.25am on Friday.
The 32-year-old, who is from Manchester and is serving a sentence for robbery, is described as being black, with brown eyes and shaved black hair.
Chief Inspector Matt Kennerley said: "We are working hard to locate Walker and return him to custody, and I would urge anyone who sees him to get in touch with us immediately so that we can trace him.
"Walker has a history of violence and therefore I would urge members of the public not to approach him, but to call the police as soon as possible.
"We are working closely with HMP Haverigg and have a number of specialist resources deployed to find and return him to prison as swiftly as possible."
The prison, on the site of an old RAF training centre near the village of Millom, holds around 650 category C and D male prisoners.