Three teenagers have been charged after an alleged hit and run incident involving a Perth policeman last week.
The Senior Constable was operating a speed camera on Albany Highway in Beckenham last Thursday morning when he was knocked to the ground by a scooter carrying three people.
The scooter rider and his two passengers then ran away.
The police officer was treated for cuts and bruises.
A 15-year-old boy and two 17-year-old males have been charged with stealing and allegedly possessing cannabis.
One of the 17-year-olds has also been charged with a string of driving related offences.