MILWAUKEE—A fight over a social media post escalated into a shooting that wounded five people outside a Milwaukee high school, police said Wednesday. Four teenage girls and a woman were shot about 7:30 p.m. Tuesday outside Rufus King High School where a basketball game was taking place, Police Chief Jeffrey Norman said at news conference. Police say the suspect is a man known to them who remained at large. Norman said two females were fighting outside the school and a group had gathered to watch them when the gunman opened fire, striking the five victims, including two 15-year-olds, and three others ages 16, 17 and 20. The victims were treated at hospitals and their wounds were not believed to be life-threatening. Police are still investigating whether any of the victims shot were involved in the initial fight, officials said. Norman and other officials at the news conference expressed frustration that …