The knife-wielding attackers, moving under cover of night, targeted people in the town of Banki, 80 miles (130 km) southeast of the city of Maiduguri in Borno state, the epicentre of the eight-year conflict with Boko Haram, said a community leader and a local member of a vigilante group.
The attack on the town, which sits on the border with Cameroon, is the latest in a string of deadly Boko Haram raids and bombings that have undermined the Nigerian military's statements that the insurgency is all but defeated.