A 27-year-old woman has died following a two-car collision near Balingup in Western Australia’s South West, with police investigating the circumstances of the crash and appealing for witnesses.

Emergency services were called to South Western Highway at approximately 1pm on Monday, September 28, after two vehicles collided. Police confirmed that the woman was travelling as a passenger in one of the vehicles and died at the scene.

The crash also left two other people injured. A 35-year-old man suffered serious injuries and was transported by rescue helicopter to Royal Perth Hospital for further treatment. An 18-year-old driver involved in the collision was taken to Bridgetown Hospital with injuries that were not considered life-threatening.

The incident prompted a significant emergency response in the Balingup area, with police and medical crews attending the scene. The circumstances surrounding the collision remain under investigation, and investigators are seeking information that could help establish what happened before the vehicles collided.

Fatal crashes on regional highways can require detailed investigations, including examination of the vehicles, road conditions and available witness information. Police have appealed to anyone who may have seen the vehicles before the collision or witnessed the crash to come forward with information.

The investigation comes as authorities continue to monitor road safety across Western Australia, particularly on regional roads where longer travel distances and changing conditions can create additional risks for motorists.

South Western Highway is an important transport route through the South West region, connecting communities and providing access between regional towns and larger centres. The Balingup area is located in the state's South West, approximately between Bunbury and Bridgetown.

Police have not indicated that charges have been laid in connection with the crash. The investigation remains ongoing, and authorities are continuing to establish the full circumstances surrounding the collision.