UPDATE: Police have called for anyone with information about a crash in Maylands in which a 12-year-old boy was injured to come forward.
The Bayswater boy was hit by a Hyundai Getz being driven east along Whatley Crescent by a 22-year-old female driver.
The crash happened near the intersection of Caledonian Avenue.
The driver stopped at the scene.
Anyone with information should contact Crime Stoppers on 1800 333 000 or make a report online at www.crimestopperswa.com.au.
EARLIER: A 12-year-old boy is in a serious condition in hospital after a crash in Maylands last night.
The boy was hit by a car while on foot on Whatley Crescent at 5.45pm.
Officers are investigating the circumstances of the crash, but no charges have been laid.
A St John Ambulance spokesman said the boy was transported under Priority One conditions to Princess Margaret Hospital, where he remains this morning.