QAYYARA, IRAQ: Sitting on a broken chair at a school where hundreds of families who fled ISIS are seeking refuge south of Mosul, Younis Ali describes how he lost his four brothers and five sisters. “I have learned that they tried to take one brother as a human shield,” he said, speaking of ISIS, who ruled his village until last week. “When he resisted they shot him dead. But another brother was also killed when he tried to prevent his death,” said Ali, 20, who was told of this tragedy by his mother. “And then another brother tried to hug the one who was shot and the same thing happened and they were all shot dead.” The jihadists didn’t stop there. They also kidnapped his five sisters. This happened near Mosul, the last city stronghold of ISIS that Iraqi forces want to take back with air and ground support from a U.S.-led coalition. Ali says he is a member of a tribal force that is supporting the government offensive on Mosul. His account confirms that ISIS is resorting to the tactic dreaded most by the population, the attacking forces and humanitarian organizations: human shields. The United Nations High Commissioner for Human Rights, Zeid Ra’ad al Hussein, on Friday said ISIS militants had taken 550 families from villages around Mosul and were holding them near ISIS locations in the city, probably as human shields. Ali isn’t spending much time these days thinking about whether the Mosul offensive would rid the country of ISIS and eventually create unity among Iraqis split along sectarian lines, mainly Sunni and Shi’ites. “All I want to do is find people from Daesh and behead them,” he said, using the Arabic acronym of ISIS. As he spoke, several veiled women told similar stories. Thaiban Sulaiman Ali recalled how her two brothers and two uncles and a total of ten people in her immediate family were taken hostage by ISIS. “Sixteen members of my extended family have been taken as human shields or hostages by Daesh,” she said. “And they also blew up some of our homes.” Hundreds of people who have gathered at the school in Qayyara, a town under government control 60 km (40 miles) from Mosul, were being vetted by Iraqi security officials in case some were ISIS fighters posing as non-combatants.