6 hurt in ‘flash mob’ attack in Center City, including off-duty cop

Several people were hurt, including an off-duty police officer, in what people called a “flash mob” attack in Center City on Saturday night. According to police, a smaller group of juveniles broke off from a large crowd and began attacking people in the area of 16th and Walnut streets around 6 p.m. Saturday night. Six people were injured. -- More...