The RAC Rescue chopper has been deployed to a motorcycle crash near Dwellingup on Friday afternoon.
The Department of Emergency Services has confirmed the crash has happened on Pinjarra-Williams Road, near the intersection of Grey Road, in Teesdale.
A St John Ambulance spokeswoman said a man in his 20s had sustained injuries after his vehicle collided with a tree.
Volunteer firefighters are assisting at the scene.
More as it comes to hand.