Blast kills at least three outside Nigerian barracks - witnesses
No one claimed responsibility for the blast but Islamist group Boko Haram has set off explosives and killed thousands in its five-year-old bid to carve out an Islamist state in the northeast.
"I heard a loud sound and then black smoke covering the place ... We saw soldiers moving bodies," trader Bello Kasuwankatako told Reuters.
(Reporting by Isaac Abrak; Writing by Andrew Heavens; Editing by Sonya Hepinstall)