One of the park's volunteer maintenance carers, Max Shanks, said he was disappointed that nobody saw or heard the vandals.

"It's hard to believe that somebody didn't see or hear what was going on. We put a lot of time and effort into keeping the park in good shape for local families to enjoy. It's sad to see it treated this way," he said.

"I urge everybody to be on the lookout for these vandals," he said.