Major Crash investigators have called on witnesses to a serious crash in Warnbro which left a woman fighting for life last Friday.
Investigators said a black Mitsubishi Triton ute and a red Nissan Micra hatchback collided at the intersection of Royal Palm Drive and Ennis Avenue about 9am on August 7.
The driver of the Nissan Micra, an 84-year-old woman, received serious injuries and remains in a critical condition at Royal Perth Hospital.
The driver of the Mitsubishi Triton, a 32-year-old man, was treated at Rockingham Hospital for minor injuries.
Police urge anyone who saw the crash, the vehicles in the area prior to the incident, or may have dashcam vision to come forward.
Anyone with information is asked to contact Crime Stoppers on 1800 333 000 or report online at http://www.crimestopperswa.com.au.