Nigerian troops, Boko Haram militants clash in Maiduguri

Meanwhile, the Islamist militant group attacked civilians in Nigeria's Adamawa state on Sunday as US Secretary of State John Kerry visited Lagos.

By , Associated Press

Jossy Ola/AP

In fierce fighting Sunday that killed more than 200 combatants, Nigerian troops clashed with Islamic extremists who attacked Maiduguri, the biggest city in northeastern Nigeria, from three fronts.