Vandals set the playground on fire at McFerrin Park Tuesday night.
Firefighters extinguished the flames that damaged part of the slide and notified Metro police around 9:45 p.m.
Whoever set the fire had already taken off.
There is no word on any suspect descriptions at this time.
Officials told News 2 people nearby must have noticed the fire and called the fire department.
Anyone with information should contact Metro police at 615-862-8600 or Crime Stoppers at 74-CRIME.