128-year-old amusement park tightens its rules after violent teen takeovers hit rivals

Kennywood, a nearly 130-year-old amusement park outside Pittsburgh, Pennsylvania, is tightening its summer chaperon policy as parks around the country experience violent brawls and unruly teen crowds heading into the heart of the season.

The popular Pennsylvania amusement venue said guests ages 15 and under must be accompanied by a parent, guardian or other supervising adult during all operating hours, effective June 12. The updated policy will apply through Sept. 7, according to a company statement.