Mandurah detectives are continuing their investigation into a shooting incident in Secret Harbour on April 13.
According to police, around 7pm three cars, a red Nissan Pathfinder four-wheel-drive, a red ute and a black sedan, were in the surf beach carpark on Secret Harbour Boulevard when an altercation took place between the occupants of the vehicles.
Detectives are investigating reports of gun shots from one of the cars in the car park and whether drugs were involved.
It is believed none of those involved sustained injuries.
Police are appealing for anyone with information, people who might have dash cam footage and those who were in the area of the Secret Harbour Surf Life Saving Club, Golf Course and shopping precinct to contact police.
Information can be reported to CrimeStoppers on 1800 333 000 or crimestopperswa.com.au.