In Nigeria, the militant group Boko Haram has attacked the northeastern city of Maiduguri, killing at least 15 people amid fears the toll may be much higher. It’s the second assault in days after Boko Haram invaded a village on Christmas, killing at least 14 people. The attack came just after Nigerian President Muhammadu Buhari said Nigeria has “technically won the war” against Boko Haram.