A two-year-old girl was among those taken to hospital following the crash.
Three pedestrians have been hospitalised after a car crash on Friday.
A two-year-old girl, a 20-year-old man and a 38-year-old man were all at the intersection of the West Coast Hwy and Manning St in Scarborough, in Perth's northwest, when they were struck by a car about 7.10pm.
The 38-year-old male pedestrian suffered serious injuries and was taken to Royal Perth Hospital.
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A 20-year-old man suffered minor leg injuries and was treated by paramedics.
The two-year-old girl was also assessed by paramedics.
She was later taken privately to Perth Children's Hospital for further medical attention.
The alleged driver of the Lexus that hit the pedestrians, a 76-year-old woman, was not injured and stopped and remained at the crash site after the incident.
Investigations are ongoing, and anyone with information or dashcam footage is urged to contact Crime Stoppers.