FILE - In this file image taken from video released Friday Oct. 31, 2014, by Boko Haram, Abubakar Shekau, centre, the leader of Nigeria's Islamic extremist group, surrounded by his fighters. Nigeria-based Boko Haram extremists have killed more than 380 people in the Lake Chad region since April, a major resurgence of attacks that has resulted in double the casualties compared to the five months before April, Amnesty International said Tuesday, Sept. 5, 2017. (AP Photo/Boko Haram,File)
Boko Haram leader Abubakar Shekau is seen surrounded by his fighters in this still from a video released by the group on October 31, 2014. AP

ISIS affiliate releases video of Nigerian aid workers begging for their lives


The National