Residents said hundreds of civilians are fleeing Nigeria's northeastern city of Maiduguri as fears grow that Islamist Boko Haram militants may try to assault the Borno state capital after seizing towns and territory around it. Heavily-armed Boko Haram fighters using captured military vehicles and weapons have taken towns and villages to the north, east and south of Maiduguri in the last few weeks and days in an apparent strategy to encircle the city and hold territory. Apprehension among Maiduguri residents grew after fierce fighting since Monday between Nigeria's military and attacking Boko Haram fighters over the town of Bama, 45 miles southeast of Maiduguri.