About 3.25pm, a 12-year-old girl alighted from a Bunbury City Transit bus on Blair Street near the intersection of Hayes Street. As she crossed the road from behind the bus she was struck by a white Subaru Forrester wagon that was travelling in the same direction as the bus.
The female driver of the Subaru stopped and assisted the young girl until ambulance officers arrived.
The girl from Bunbury received serious injuries and was conveyed by ambulance to Bunbury Regional Hospital.
Several people stopped to assist at the time and police would like to speak to those people as well as anyone who saw the crash. Anyone with any information is asked to call Crime Stoppers on 1800 333 000 or report online at www.crimestopperswa.com.au.