About 1.15pm, emergency services received a report of a collision between a white Toyota Corolla hatchback and the rider of a mobility scooter at the intersection of Chapman Road and Queen Street.
The rider of the mobility scooter, a woman aged in her 80s, was conveyed by St John WA to Royal Perth Hospital with life-threatening injuries.
Major Crash Investigation Section officers have been deployed to investigate the circumstances surrounding the collision.
The driver of the Toyota Corolla is assisting police with inquiries.
Major Crash investigators urge anyone who witnessed the crash, or who has any CCTV, dash-cam or mobile phone vision to contact Crime Stoppers online at www.crimestopperswa.com.au or by calling 1800 333 000.
Reports made to Crime Stoppers can be made anonymously.
Vision can also be uploaded directly to investigators via the following link: https://wapf.au.evidence.com/axon/community-request/public/mobilityscoo… ;