Amnesty International has revealed that Nigerian security forces received multiple advanced warnings about the raids that took place on the Chibok boarding school April 14-15, in which over 240 schoolgirls were kidnapped by Boko Haram forces. Security forces were warned hours in advance, according to the rights group, who accused the Nigerian authorities of “gross dereliction of duty.” Amnesty International independently verified information based on multiple interviews with credible sources, and concluded that the Nigerian security forces had over four hours of advance warning about the attack but not take measures appropriate to prevent it. Security and local officials