Police are appealing for witnesses after a motorist was left with head injuries.
The incident happened between 4.30 and 4.40pm on May 31 when the complainant was in a silver coloured Renault Megane on Manchester Road with the junction of Park Road.
He stopped behind a blue coloured hatchback and remained in his car.
A man left the hatchback and walked towards the Megane, opening the door and assaulting the victim with a metal bar causing head injuries.
The public intervened and the man then left the scene in the blue car.
Police want those witnesses to contact PC Derrick Pryce on 101.