A crash on the Mandurah Estuary Bridge in Halls Head caused massive traffic delays on Wednesday morning.
The crash, believed to involve a bus and three cars, happened just before 9am.
A St John Ambulance spokesperson said a woman in her 20s and a man in his 50s have both been conveyed to Peel Health Campus with non life-threatening injuries.
The Mandurah Estuary Bridge has since reopened.
Female passenger dies after horror Kwinana Freeway crash
Havana Brown and Thelma Plum to headline 2026 Crab Fest
Hazmat warning issued after rubbish truck catches fire in Kwinana Beach
WA Police ramp up patrols near schools as students return for Term 1
Fire engulfs car then spreads to bushland in Oakford
Community bands together to provide essential school supplies to local children
Detectives continue to hunt man who dragged woman by hair into bushes in Halls Head
Woman airlifted to hospital following South Yunderup crash
Shire of Murray celebrates outstanding citizens