At least one gunman opened fire on police Wednesday as they were serving a drug warrant in Philadelphia, wounding six officers and triggering a standoff that extended into the night, authorities said. Two other officers were trapped inside the house for about five hours after the shooting broke out but were freed by a SWAT team well after darkness fell on the residential neighborhood. None of the officers sustained life-threatening injuries and they’ve been released from the hospital, Philadelphia police Sgt. Eric Gripp said.
