The militants raided Ldubam Bah village of the region at about 7 p.m. on Saturday, killing four civilians, a security source in the region told Xinhua.
At about 8 p.m. on the same day, the militants attacked Mavoumai village of the region, killing one person and injuring a girl, the source said.
Local media reported that villagers were fleeing from the villages where the raids were carried out.
Boko Haram has been operating in the region since 2014.
AMK/PR