EMERGENCY services are the scene of a crash involving a SUV and a mini bus in Piara Waters.
One person had to be cut out of the wreckage of an 4WD, while firefighters are still working free at least one person trapped in the bus.
About a dozen firefighters are working to free the victims.
A man and a woman were also being treated by paramedics next to the damaged vehicles but have now been taken to hospital. One of them was believed to be the driver of the 4WD.
A man has been taken to Fiona Stanley Hospital and a least one woman has been seriously injured.
The crash happened on Armadale Road near the Warton Road intersection about 5.20pm.
Armadale Road is closed to traffic and motorists are advised to avoid the area.