A teenage girl says she is traumatised after she was threatened and scratched by three men dressed as clowns while in Perth last night.
Rastana Baker, 16, had got off a bus at Baldivis, in the city's south, when three people got out of a car wearing clown masks and dark clothing.
As she ran off, one of the clowns approached Rastana and grabbed her shoulder.
"Running in and out of the bushes, walking up to me, walking back, running, switching lanes on the roads making clown laughs, noises," Rastana said of the men today.
Scared and panicking, Rastana broke free and ran roughly two and a half kilometres to get help.
"We pretty much just dropped in the middle of the street, started crying," Rastana said.
"They think it's just a bit of fun but at the end of the day, you're not the one who has to walk away with the scars," she said.
The incident followed a post on a Clown Purge Australia Facebook page, signalling clowns would be appearing in Perth suburbs after the release of the new movie It.
Based on the Stephen King novel of the same name, the film features an evil clown called Pennywise.
The creator of the page has insisted the clowns mean no harm but police are unimpressed and say they risk causing a serious incident.
"Those who are dressing up and carrying out silly acts should think seriously about what they are doing - the distress caused to people is unnecessary and may lead to further harm," WA Police said.
"By participating in this craze, people may be committing criminal offences and if so they will be charged by police."
Last year, a 19-year-old Western Australian man was charged and received a good behaviour bond after he chased a group of teenage girls while dressed as a clown near a shopping centre.