Nigeria: Boko Haram Claims it is Islamic Caliphate

Maiduguri, Nigeria: Boko Haram, the Islamic extremist group operating mainly in northeastern Nigeria, claims it has added the city of Gwoza to an Islamic state that it has established in northeastern Nigeria.

Boko Haram's leader, Abubakar Shekau, said in a video seen Sunday that Gwoza is now part of its "Islamic Caliphate."

But Nigeria's army said on Twitter: "That claim is empty ... the Nigerian state is still intact."

President Goodluck Jonathan declared a state of emergency in three northeastern states in May last year, saying Islamic militants had taken over parts of Borno state, Boko Haram's birthplace.

After the emergency was imposed, the military seemed to be gaining control of parts of the northeast, sending militants fleeing into neighboring states. But Boko Haram's violent attacks have increased, killing thousands this year.