Police are urging the public to help identify a motorcyclist who crashed into a cyclist on a bike path in Kambah on Saturday before fleeing the scene.
Police said the cyclist had been riding north along a bike path behind the sports centre on Jenke Circuit, Kambah, about 8.30pm when he and a motorcycle travelling south collided head on.
The cyclist broke his leg in the accident, and the motorcyclist sped from the scene.
The motorcycle is described as a full size trail motorbike with no plates. Its rider was wearing a black full-face helmet.
Police asked anyone who might have seen the collision or had any information to contact Crime Stoppers on 1800 333 000 or at act.crimestoppers.com.au.