Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Is Boko Haram Gaining Foothold in Nigeria's Northwest? Sirwan Kajjo Boko Haram's claim of responsibility for a recent kidnapping of more than 300 students in Nigeria's northwestern state of Katsina signals that the militant group is expanding its terror activities beyond its traditional stronghold in the West African country's northeast, experts warn. On December 11, Boko Haram's leader, Abubakar Shekau, said in an audio recording that his group was behind the abduction of the schoolboys in the town of Kankara in Katsina. The students, however, were released several days after being abducted by gunmen. .