Security forces are investigating reports that Boko Haram leader Abubakar Shekau was killed by Cameroonian military forces on Sept. 17 in northern Nigeria. A number of Boko Haram fighters surrendered after clashes with the Nigerian military in Konduga that reportedly left some 50 insurgents dead. Boko Haram has been negotiating since August with government and International Red Cross Officials about releasing kidnapped Nigerian schoolgirls.