HAVERTOWN, Pa. (CBS) -- It's not just happening in the city. Groups of kids are causing havoc in Havertown. They're attacking other young people for no apparent reason, and they're creating a panic in the Delaware County town. Police are fed up, saying this will not be tolerated. They're increasing their patrols to track them down. CBS Philadelphia spoke with one parent whose son was attacked. In that incident, it was 10 teens on one, them delivering blows, punches and kicks. Police are working to identify the people responsible and promise arrests will be made. Groups of teens have created...