Concerns are growing for 48-year-old Mark Riley who has been missing from his home in Worksop since yesterday.
He left his home without money or a mobile phone and his family are growing increasingly concerned for his welfare.
Police are keen for Mark, or anyone who has seen him, to get in touch.
Mark is about 5ft 11ins tall, and of a heavy build. He has wavy, white hair, a ruddy complexion and blue eyes. He has tattoos of names on both of his upper arms.
He was last seen wearing a yellow fleece top and bottle green trousers.