Two porta-potties were set on fire at Hillside Park in Bismarck at 1:22 a.m. Tuesday.
Bismarck Police Officers got an anonymous tip about the fire.
The Bismarck Fire Department put out the flames and did not find evidence of arson.
Officers did not see anyone in the area.
The porta-potties belonged to Spiffy Biffs, and the damage is valued at $3,000.
Anyone with information can call Crime Stoppers at 224-8477.