Taliban authorities accused Pakistani forces on Tuesday of killing three civilians — a woman and two children — in clashes along their northern border. The latest exchange of fire took place on Monday near the Torkham border crossing in Afghanistan’s Nangarhar province, with each side accusing the other of sparking the clash. Pakistan and Afghanistan forces regularly exchange fire, often sparked by disagreements over construction near the Durand line, a 2,400-kilometre (1,500-mile) frontier drawn by the British in 1896 and disputed by Kabul. “Pakistani forces targeted civilian houses and kil…