Police are investigating gun shot reports in Secret Harbour.
Mandurah Detectives are investigating an incident in Secret Harbour on Thursday.
Police said three vehicles, a red Nissan Pathfinder four wheel drive, a red utility and a black sedan were in the surf beach car park on Secret Harbour Boulevard at about 7pm.
An altercation took place between the occupants of the vehicles.
Detectives are investigating reports of gun shots from one of the vehicles in the car park and whether drugs were involved. It is believed no one was injured.
Anyone who may have information or were in the area of the Secret Harbour Surf Life Saving Club, the golf course and Secret Harbour shopping precinct should call Crime Stoppers on 1800 333 000 or online at Crime Stoppers.