Tulsa police are investigating after juveniles dropped a concrete rock from Sheridan Road onto the Creek Turnpike late Monday. We're told that police were called to the westbound lanes of the turnpike at about 11:45 p.m. after the concrete smashed into the windshield of a Ford Mustang that was carrying a man and his father. The driver continued to Yale Avenue where he exited the highway and returned to the Sheridan overpass where the suspects took off running. Tulsa Police Sergeant Mark Watson tells us the juveniles who ran away from the scene are 14 and 15 years old. "We're only going to end up arresting one of them for actually dropping the piece of concrete off the bridge," Watson said. We're told the driver's windshield was broken and a passenger in the car was cut by flying glass. The police helicopter was able to follow the kids to a nearby back yard where they were located at about midnight. Watson says that only one of the juveniles was charged in the incident. "He's going to be arrested for assault with a deadly weapon. He's a 15-year old male," Watson said.