Some of the released Chibok girls in Banki, Nigeria, near the Cameroon border. Two sources close to the negotiations told CNN that Boko Haram received money as part of the deal. Boko Haram's uprisingChibok is in northeastern Borno state, where Boko Haram is strongest. The militants were believed to have taken their Chibok captives to the dense Sambisa forest, a reputed Boko Haram stronghold. That year, Boko Haram was responsible for 6,644 deaths, compared with ISIS, which was responsible for 6,073, according to the GTI.

Source: CNN October 15, 2016 21:11 UTC