A driver has allegedly crashed his car and fled the scene, leaving the passenger behind.
The man was driving a Holden Colorado along Roe Highway in Canning Vale around 8.30pm on Sunday when he drifted into the gravel shoulder and hit a light pole.
The driver allegedly fled the scene, leaving his female passenger inside the vehicle.
She was taken to Royal Perth Hospital.
The man, aged in his 20s, was found by police at a house in Hammond Park and is assisting with inquiries.
Officers would like to speak to anyone that witnessed the crash, or saw the Colorado prior to the crash.
Anyone with information is asked to call Crime Stoppers on 1800 333 000 or to make a report online at crimestopperswa.com.au.
Police seek witnesses to serious crash in Pinjarra
Local artist Emma Blyth inspires community to raise $10k for Mandurah kids facing hunger
Hunt continues for Baldivis ATM thieves
Channel 7 Mandurah Crab Fest a cracking success
Giant puppets, illuminated installations to descend on Baldivis Sports Complex
Man fined nearly $2k for undersize crab haul near Coodanup
Australia Post reveals Mandurah residents receive highest volumes of parcels
Safety Bay man charged over South West pursuit
Arson Squad continue investigation into Waikiki house fire