A man was left with a dislocated shoulder and cuts to his head and hands after he was attacked in the street.
The 50-year-old was approached by a man on Albert Road at around 1.30am yesterday. He was then punched and forced to the floor, where the offender then searched his pockets, police have said.
The man was taken to hospital to receive treatment for his injuries.
Police inquiries are ongoing. Anyone who can provide officers with information about the incident is asked to call the non-emergency number 101 quoting the log reference number WA1709489.