PHILADELPHIA (AP) — Police have restored calm in Philadelphia after a roving crowd of teens and young adults damaged six patrol cars in the city. Police tell WPVI-TV an estimated crowd of 800 to 1,000 people swarmed through a section of the city just before 11:30 p.m. Sunday. Chief Inspector Joel Dales says police had no warning and don’t know why the crowd had gathered. People were jumping on cars. Dales says windshields were broken and side mirrors were damaged. No injuries were reported.