State police at Frackville are investigating a vandalism incident in which heavy equipment was damaged.

Troopers said three windows on heavy equipment owned by Joseph Kuperavage Jr. of Port Carbon were smashed while they were parked at the Eagle Hill mining site in Blythe Township. Damages were estimated at $2,700. The incident occurred sometime between Sunday at 2 p.m. and Monday at 8 a.m.Troopers said the victim is offering a reward for information leading to the arrest and conviction of those responsible. Surveillance video is also being examined.