(Hamilton)---Hamilton City leaders tell WMOH Radio they cannot be sure it was vandals that caused damage to three trees that were found toppled on the walkway to the RiversEdge Amphitheatre on Monday. Adam Helms with RiversEdge says damage may have been caused by thunderstorms that moved through the area over the weekend. A landscape worker told WMOH earlier in the day he believed the trees were brought down by vandals. A vandalism spree at the park last month forced city leaders to respond by spending $25,000 for new video cameras at RiversEdge, Veteran's Park, and the three new splash pads.