State police at the Frackville barracks are investigating a criminal mischief incident that happened between 7-9 a.m. Dec. 19 at the Pennsylvania Wax Corporation, 140 Walnut St., Tuscarora.

Police said someone threw garbage in a burn barrel at the Schuylkill Township site and lighted a fire there, leaving the burn barrel unattended. Police said workers were at the plant at the time of the incident but did not observe anyone in the area.