About 2.30pm, a white Toyota postal van travelling on Corio Road and a white Holden Trax station wagon travelling on Lakes Road collided at the intersection of the two roads.
The 68-year-old female driver of the Holden sustained serious injuries and was conveyed by ambulance to Royal Perth Hospital.
The 24-year-old female driver of the Toyota sustained minor injuries and was conveyed to Rockingham General Hospital.
Major Crash investigators are urging anyone who saw the crash, or who saw the postal van or the Holden Trax travelling in the area prior to the crash, to contact Crime Stoppers online at www.crimestopperswa.com.au or by calling 1800 333 000.
Anyone with dash-cam, CCTV or mobile phone vision relating to this crash is asked to upload the vision directly to investigators via the following link: https://wapf.au.evidence.com/axon/community-request/public/mcis2026-236
If you or anyone you know has been affected by a road crash, contact Road Trauma Support WA on 1300 004 814.