A 28-year-old woman was injured overnight when a car allegedly involved in a police chase crashed into her vehicle in Tuart Hill.
It is understood the woman was travelling on Wanneroo Road near the Morley Drive intersection, when a white Ford utility allegedly ran a red light and collided with her Mazda hatchback about 9.20pm.
A witness told The West Australian the crash gave the unmarked police car the opportunity to cut across the crash scene and block the utility.
The white utility then allegedly crashed into the police car causing minor damage.
St John Ambulance paramedics took the woman to Royal Perth Hospital but she was released a short time later.
The male driver of the utility was arrested at the scene.
A search of his car allegedly uncovered a machete, sword, knife and a smoking implement.
Police allege the chase started five minutes earlier on Finchley Crescent and Markham Way in Balga.
They have charged a 32-year-old man of no fixed address with reckless driving, fail to stop, no authority to drive, possessing a smoking implement, breaching bail and three counts of possessing a controlled weapon.
He is due to appear at the Perth Magistrates Court today.