The victims had been watching a soccer match on television Sunday night in the town of Konduga in Nigeria's Borno state.
Usman Kachalla, head of operations at the State Emergency Management Agency (SEMA), said Monday the attack took place about 30 kilometers (18 miles) from Maiduguri.
There was no immediate claim of responsibility though the attack bore the hallmarks of Boko Haram, the Islamic extremist group based in nearby Maiduguri.
Kachalla said that about 40 other people were wounded and taken to nearby hospitals.
Copyright 2019 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.