Police in Perth are searching for a man who was allegedly masturbating nude in the middle of a suburban park.

A resident opposite the Luketina Reserve in Wembley Downs reported seeing the man, who was wearing a hat and nothing else, at about 10pm on January 13.

He was alone at the time of the alleged incident.

The man is described as aged between 20 and 30 years old with fair skin and a solid build.

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Scarborough Police are investigating.

Anyone with information is encouraged to call Scarborough Police on 9441 6400 or report anonymously online.

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