Boko Haram besieging villages in Nigeria

Boko Haram fighters are overrunning villages near the Nigerian town of Chibok, forcing hundreds of people to flee as they loot and burn in the area, local leaders have said.

"Chibok is now under Boko Haram siege," the chairman of the Chibok local government area, Yaga Yarkawa, told journalists in Maiduguri, the birthplace of Nigeria's homegrown Islamic extremist group, 80 miles to the north east.