South West Traffic officers are trying to figure out what happened in the moments leading up to a truck and pedestrian colliding yesterday.
A 23-year-old Donnybrook man remains in Royal Perth Hospital this morning with serious head and back injuries after being airlifted by the RAC helicopter from the scene of a crash in the south west yesterday.
Around 7.30am yesterday an Isuzu truck was travelling north on South Western Highway just south of Boyanup when it collided with the 23-year-old victim.
The man was walking north along the side of the highway next to the northbound lanes.
Following the incident the truck driver stopped at the scene and emergency services were called to attend.
Police and St John's Ambulance crews attended before the man was airlifted to Royal Perth Hospital.
Anyone with information regarding this crash, or who saw the pedestrian or Isuzu truck prior to the crash, is asked to call Crime Stoppers on 8900 333 000 or report the information online at www.crimestoppers.wa.gov.au.
Newly redeveloped Stan Twight Reserve Clubrooms unveiled
WATCH: Police hunt arsonist who set cars alight in Port Kennedy
Cold Case detectives ask for public assistance into Halls Head car theft, shots fired incident
Emergency crews attend serious crash in Warnbro
Detectives release CCTV after four cars firebombed in Greenfields, Dudley Park
Pop trio Sheppard to headline New Year's Eve celebrations in Rockingham
Man charged over alleged stabbing of teen near Rockingham Train Station
Western Foreshore development: State Government community feedback period now open
Southern suburbs man claims $2.5 million Lotto win