SRINAGAR: After a lull of weeks, the target killers struck again in Srinagar on Sunday night, killing a policeman. The officials said that Jammu and Kashmir policeman Tawseef Ahmed Wani was shot and critically wounded by gunmen outside his residence in SD Colony of Srinagar's Bemina area. The police sources said that after 29-year-old Wani was targetted by the assailants …