FILE – In his file image taken from video released late Friday evening, Oct. 31, 2014, by Boko Haram, Abubakar Shekau, centre, the leader of Nigeria’s Islamic extremist group denies agreeing to any cease-fire with the government and says more than 200 kidnapped schoolgirls all have converted to Islam and been married off. Boko Haram leader Abubakar Shekau Tuesday Jan. 20, 2015 claimed responsibility for the mass killings in the northeast Nigerian town of Baga and threatened more violence. As many as 2,000 civilians were killed and 3,700 homes and business were destroyed in the Jan. 3, 2015, attack on the town near Nigeria’s border with Cameroon, said Amnesty International. (AP Photo/Boko Haram,File)