POLICE want information about a serious crash on August 25 that left a 26-year-old pedestrian in a critical condition. The blue Mazda 3 hatchback was travelling northwest when it collided with a Bentley man on the road on Sevenoaks Street. Due to the serious nature of the injuries, a police officer drove the ambulance to Royal Perth Hospital to allow St John Ambulance personnel to provide emergency first aid. The driver of the vehicle was not injured. Anyone with information about the crash, or who saw the blue Mazda 3 hatchback or pedestrian prior to the crash, is asked to call Crime Stoppers on 1800 333 000 or report the information online at www.crimestopperswa.com.au.