Police have released a photograph of a paedophile they are hunting after he breached his licence conditions.
David Chadwick from Weymouth was convicted in 2013 of sexual offences against children.
The 58-year-old was released from prison recently but breached his licence conditions on Tuesday, Dorset police said.
He is understood to have boarded a London-bound train from Moreton at around 12.40pm.
Police said he is a risk to the public and ordered people not to approach him.
He is described as white, of medium build, around 5ft 10ins tall, with short grey hair and a small scar on his left cheek.
He was wearing a dark Barbour-style jacket and glasses, and carrying A4 paperwork when last seen.
Detective Inspector Richard Dixey said: "I am releasing a photograph of David Chadwick in the hope that someone will know his whereabouts.
"Anyone who sees David should not approach him, as he presents a risk to the public, but immediately contact Dorset Police on 999.
"There may be various reasons why he has not complied with his licence conditions and I appeal to him directly to make contact with police at the earliest opportunity."
Det Insp Dixey said officers are "making every effort to find this man as soon as possible".