A man from Brighton was attacked by two men who then stole the victim's dog.
The incident happened on Thursday 27th March in the late afternoon in the open area of Dukes Mound.
The 30-year-old victim was walking his dog when he was assaulted and his Staffordshire bull terrier wearing a black leather studded coat was stolen.
The two suspects were with a woman at the time of the incident.
The first man was described as mixed race, aged late 30s with long black hair.
The second man was mixed race, aged 30 with short black hair and the woman was of mixed race with black shoulder length hair tied in a ponytail.
Anyone who saw the incident is asked to call 101.