Nigerian army blockades Boko Haram base

Nigerian soldiers have blocked roads out of a key northeastern city to deprive Boko Haram fighters of supplies in remote towns they control, the army has said.
The military said on Sunday that its offensive against the group, which followed a declaration of a state of emergency in three northeastern states, was aimed at re-establishing Nigeria's "territorial integrity".
Al Jazeera's Yvonne Ndege reports from Maiduguri.