A number of offenders were detected riding trail bikes illegally through parklands in the Bridgewater and Gagebrook area today.

Three bikes were seized in three separate incidents.

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Sergeant Jason Klug said other park users could be at risk of serious injury if struck by a trail bike.

"Police will continue to take these matters seriously," he said.

"Police remind the public that using a motor vehicle for a recreational purpose within 500 metres of a domestic premises is an offence.

To provide information anonymously, call Crime Stoppers on 1800 333 000 or visit crimestopperstas.com.au.