State police at Lehighton are investigating an incident at a Monroe County company's property.

Troopers said unknown criminals entered an area along Old Route 115 at Meixsell Valley Road, in Ross Township, and damaged numerous electrical and hydraulic lines on two rollers, a paver and a street sweeper. The items are property of Hanson Aggregates Inc., of Stroudsburg. All four machines involved were left inoperable due to the damage, troopers said. The incident occurred sometime between Sept. 5 and 8. Total cost of repairs was estimated at $500.Anyone with information concerning this incident is asked to call troopers at (610) 377-4270.