Video has emerged of a driver in Rockingham allegedly threatening to play chicken with people dressed as clowns.
Police continue to investigate an incident in Baldivis where a 16-year-old girl was allegedly stalked and grabbed by one of three people wearing clown masks on Saturday.
In Mandurah, a teenager said she was threatened and chased with a hammer during another clown craze prank.
Scott Cunningham from Nine News reports a video has now emerged of a group of clowns on the side of the road in Rockingham being targeted by a car.
"This is the kind of thing that police has warned the community about, these vigilante attacks that have stemmed from this so-called clown purge that was organised over the weekend."
Mandurah Crab Fest boasts huge range of free, family friendly entertainment
Fuel prices surge in Perth, Mandurah
Teen boys charged over Mandurah burglaries
Tragic update in search for missing man Robert Snyder
Premier Roger Cook to leave Kwinana electorate, move to Perth
Mandurah Marine Rescue's new vessel named in memory of nun who survived 1959 boating accident
Teen dies in motorbike crash at Waroona Dam
Shark alert issued after whale carcass reported at Preston Beach
Kwinana businesses to refuse serving students during school hours