Authorities are calling upon anyone with dash cam footage to come forward, after a vicious road rage attack at Auburn.
NSW Police said a 65-year-old man was found lying next to his Holden on Ettalong Road with serious head injuries on Thursday afternoon, after he was allegedly hit with a hammer during an altercation.
He was treated at the scene and taken to Westmead Hospital, where he was treated for a fractured skull, and has since been discharged.
Police arrested a 25-year-old man, who was driving a Volkswagon Golf, and later charged him with grievous bodily harm.
He was refused bail and will appear at Burwood Local Court on Friday.