Police are investigating after 17 cars had their tires slashed west side of the city of Beloit. Beloit police say the vandalism occurred late Tuesday night into early Wednesday morning. Investigators say all 17 cars had at least one tire slashed, and some had more. Officers say some were in driveways, some were parked in the road and some in the area were left undamaged. Investigators suspect a young person, or a group of young people are behind the crime.