Teen arrested after rocks thrown at cars A TEENAGER has been arrested after he allegedly threw rocks at cars from an overpass in west Sydney over the weekend. Police say the 14-year-old was arrested after rocks were allegedly thrown from an overpass on the M7, near Powers Road in Glendenning. The rocks narrowly missed two cars. Mt Druitt police later located two youths who were nearby and arrested one. He has since been released pending further inquiries.