The attack happened outside the Rowley Arts Centre in Huntingdon Street on Friday, January 29 at around 8pm. A spokesman for Cambridgeshire police said: The victim was left traumatised and with minor injuries as a result of the incident. The suspects are thought to be two females. Officers are conducting a thorough investigation and are confident more people witnessed the assault. Police are asking anyone with information about the incident to call 101, quoting CF0043130116 or call Crimestoppers, anonymously, on 0800 555 111.