NBCNews.com All of the wounded officers had been released from hospitals. The violence began as police attempted to serve a narcotics warrant. An armed suspect accused of opening fire and wounding six officers in north Philadelphia during a nearly eight-hour standoff surrendered early Thursday, officials said. The gunfire began Wednesday afternoon as police attempted to serve a narcotics warrants, police said. Shortly after midnight, police … Continue reading Suspect in custody after 6 officers hurt in hours-long Philadelphia standoff