According to a 2002 report issued by the International Eminent Persons Group, (acting with the encouragement of the US State Department) both the government-backed militias and the rebels (led by the SPLA) have been found guilty of abducting civilians, but "of particular concern" were incidents that occurred "in conjunction with attacks by pro-government militias known as "murahaleen" on villages in SPLA-controlled areas near the boundary between northern and southern Sudan." The Group concluded that "in a significant number of cases", abduction is the first stage in "a pattern of abuse that falls under the definition of slavery in the International Slavery Convention of 1926 and the Supplementary Convention of 1956."