PHILADELPHIA -- Two teenage boys are in custody and more suspects are being sought after what police called a "flash mob" attack in Center City Philadelphia that left six people injured, including an ...

Two teenage boys are in custody and more suspects are being sought after what police called a "flash mob" attack in Center City Philadelphia that left six people injured, including an off-duty police ...

PHILADELPHIA -- The term "flash mob" used to mean online-organized groups having street-corner pillow fights or sidewalk dance-offs, but in Philadelphia they've turned violent, and the reasons are as ...