The RAC rescue helicopter has been sent to a serious crash in Cardup, south-east of Perth.
It is understood a car and a truck collided near the intersection of Hopkinson Road and Orton Road on Thursday morning.
Crews are currently working to free a person trapped in the car.
The driver and passenger are believed to be injured.
Expect traffic delays in the area.
Elderly traffic warden seriously injured after being hit by truck in South West
Baldivis, Secret Harbour, Bunbury daycare centres to close
Community invited to free picnic event to celebrate completion of Mandurah Estuary Bridge
Free flu vaccines now on offer to Western Australians
Albanese announces $1.1 billion in road upgrades for Kwinana's Westport development
Drivers escape injury after head-on crash south of Perth
Whale carcass attracts sharks close to shore off Dawesville
Digital drivers' licences to be introduced in WA
Mandurah FIFO worker wins $250k