Rock thrown onto car in Rome

(ANSA) - Rome, July 23 - A large lump of tufa rock was thrown onto a car that had stopped in traffic in Rome on Tuesday.
    The rock hit the windscreen but the occupants of the car were unhurt.
    It was apparently hurled off a pedestrian bridge that connects Villa Doria Pamphili to the rest of the city.
    Witnesses told police they saw a "person" throw it off the bridge.
    The incident happened in via Leone XIII, in the Aurelia district of the Italian capital.