Buildings at Sarnia's Tecumseh Pool were vandalized sometime overnight between April 24 and 25.
Police say someone spray painted the letters "FBT" and "SDK" in three spots on the site.
Police say vandalism like this costs the citizens of Sarnia money to clean up. That money could be put toward other initiatives in the city.
Anyone with information is asked to call Sarnia police or Crime Stoppers.
