MAIDUGURI, Nigeria — A member of a civilian self-defense group says five people have been killed in an attack by suspected Boko Haram extremists in northern Nigeria.

He says six people were injured and homes and vehicles were burned.

Resident Umar Ibrahim says a suicide bomber detonated his explosives shortly after midnight near people sleeping outside their homes in the heat.

Security authorities in Maiduguri have not made a statement on the attack.

Nigeria more than once has claimed victory over Boko Haram but the group continues to carry out suicide bombings and kidnappings in the region.