About a dozen vehicles were damaged by thrown rocks Wednesday night on the Stevenson Expressway, police said, the latest in a series of rock-throwing incidents.
Vandals threw the rocks around 9:30 p.m. from the train overpass at the Pulaski exit, police said. The suspect ran off by the time officers arrived.
It's the latest in a series of at least six incidents in the past week. The most serious happened last Wednesday, shutting down the Skyway for two hours for reports of someone shooting at vehicles. Police later found out two teens had thrown rocks at the cars.
Seven vehicles were damaged that night, and police arrested two boys, ages 14 and 15. They were charged with felony vehicular endangerment and several counts of criminal damage to property.
No one was arrested in Wednesday night's I-55 incident, and no injuries were reported.
The 12 damaged vehicles had cracked windshields and dented hoods.