 In Sulaymaniyah, the rebels besieged and captured the regional headquarters of the dreaded Directorate of General Security secret police (years later, the building, known as Amna Suraka or "Red Security" in Kurdish, became a museum to the crimes of Saddam's regime).In a bloody revenge, they killed several hundred of captured Ba'athist officials and security officers without a trial; reportedly, over 900 security officers were killed at Sulaymaniyah.They also captured enormous quantities of government documents related to the notorious Al-Anfal Campaign in which the government forces had systematically killed tens of thousands of Iraqi Kurds and members of other ethnic minorities three years earlier in 1988; 14 tons of these documents were obtained by Human Rights Watch.