KABUL: The Taliban and Islamic State group jointly massacred dozens of civilians in an Afghan village, officials said Monday, highlighting rare co-operation between the insurgents that could increase the strain on Afghanistan’s beleaguered security forces. The fighters killed more than 50 men, women and children in the remote Sayad district, Sar-e Pul province on Saturday after overrunning the Afghan Local Police (ALP)—a government-backed militia—in a 48-hour battle, according to local officials. “It was a joint operation by Daesh (IS) and Taliban fighters. They had recruited forces from other provinces of the country and attacked Mirzawalang village,” Zabihullah Amani, a spokesman for the provincial governor, told Agence France-Presse. Most of those killed were shot but some were beheaded, Amani said.