FREMANTLE detectives are looking for witnesses to an assault on South Street. On Friday, October 7, at 10pm, a man was told to leave a licensed premises. The man walked away before returning to speak to a security guard. Police allege the security guard assaulted the man, causing him to fall and receive serious injuries. The guard was arrested and has been charged with grievous bodily harm. Police want to speak to the two witnesses pictured. The first witness helped the victim after the incident and the second was a patron inside the building when the man was ejected. Call Crime Stoppers.