State police at the Bethlehem barracks are investigating a burglary in Allen Township that was reported to them at 6:18 p.m. Dec. 19.

Police said it happened on Windsor Drive in the township when an unknown person gained entry to the residence by forcing open a sliding back door.

Once inside, the person stole watches that had a combined estimated value of $20,000. The suspect drove a light colored pickup according to a surveillance photo.