KWINANA Police are investigating an alleged assault that happened in Kwinana Beach on July 6.
Police allege the victim and a friend were driving a red Hyundai i30 GD series from Rockingham to Perth.
As they were driving they noticed a silver Hyundai travelling very close behind them and flashing the headlights on high beam.
The man stopped his vehicle for a red light at the intersection of Thomas and Rockingham Roads in Kwinana Beach when a man from the other vehicle exited the silver Hyundai which had also stopped.
The victim exited his car and a verbal exchange took place before the 35-year-old victim was assaulted, receiving facial injuries.
Police would like to speak to anyone who saw the incident, particularly a man in a work vehicle who stopped to assist the victim.
Anyone with any information, or who was travelling in the area around the above time and has any dash cam footage of the incident is asked to call Crime Stoppers on 1800 333 000 or report online at www.crimestopperswa.com.au.