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LAGOS, Nigeria — The leader of a radical Islamist sect has challenged the authority of Nigerian President Goodluck Jona than in an online video, promising more attacks in a nation increasingly overcome by unrest and divided by religion.
The video of Imam Abu bakar Shekau cements his leadership in the sect known as Boko Haram. The U.S. government believes Boko Haram is in contact with two al-Qaeda- inspired terrorist groups in Africa, which could account for the increasing complexity of their attacks. The Shekau video also suggests an outside influence, copying the style of other terrorist groups’ messages.



