A man has been caught on video deliberately riding a motorbike into the path of junior football players at Rushton Park in Mandurah.
It is believed to have happened around 5pm on Thursday during a training session.
The video shows the man riding dangerously close to players at high speed before leaving the scene.
A witness told West Coast Radio the man later came back in his car and tried to enter the field but couldn't due to a chain blocking the entrance.
The incident was reported to police but the man had already left the scene before they arrived.
Anyone who can identify the man should contact Crime Stoppers on 1800 333 000.
WA Police have been contacted for comment.
Pop-up ice skating rink glides back into Mandurah for winter school holidays
Federal opposition leader Angus Taylor sits down with local business owners in Mandurah
Police search for missing man last seen leaving Rockingham Hospital
West Aussies urged to be on high alert after surge in winter house fires
New $3.4 million boardwalk to be constructed at Lake Clifton thrombolites
City of Mandurah rolls out new tactile bin lids, accessibility stickers to support residents with low vision
Driver dies in hospital after Australind crash
Welfare concerns for woman with dementia last seen in Cooloongup
Charges laid over fatal West Coolup crash
