Police are asking for the public's help in the search for a convicted sex offender, after he was seen at a Dundas recreation facility on the weekend.

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Hamilton police are asking for the public's help in the search for Richard Smilsky, 54. (Supplied)

Richard Lynn Smilsky, 54, is wanted for allegedly breaking the terms of his probation, connected to an offence committed in Toronto. Police say he is also wanted for defying a Hamilton court order.

Under the terms of his probation, Smilsky is not allowed to visit any recreation centre in the province of Ontario.

Police say he is transient and has been known to travel back and forth between Hamilton and Toronto

He is described at white, five feet eleven inches tall and bald. He usually wears glasses.

Police ask anyone with information on Smilksy's whereabouts to call the fugitive apprehension unit at 905-546-8911 or Crime Stoppers at 1-800-222-8477.