Two men were charged following the alleged robbery and assault near Gardner Street about 3.30pm on July 17.

Thursday's search, in water between Martin Park and Willow park, allegedly uncovered evidence.

It's unclear what items were recovered, but it's alleged property was stolen from the victim.

Detective Senior Constable Brianna Gibson said it was a concerning incident.

"We are still appealing for any witness or information that may assist police in relation to the incident," she said.

"The incident is concerning and the investigation is still ongoing.

IN OTHER NEWS:

"Two young males have been charged."

One man remains in custody following the incident and one is on bail.

Police are treating it as an isolated incident.

Anyone with information can call (02) 6049 2600.

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