KARACHI: At least sixteen terrorists were gunned down and four law enforcers, including two army men, were martyred in separate gun battles across Khyber Pakhtunkhwa, Balochistan, and Punjab provinces on Saturday and Sunday. In an intelligence-based operation in the Baka Khel area of Bannu district, five militants were killed while nine others sustained injuries. During the shootout, 29-year-old sepoy Iftikhar …