More than 120 buildings, including eight churches, were also razed to the ground.
Samuel Adamu, who was in one of the villages that came under attack, said: "They laid siege to the village before they started shooting sporadically and throwing explosives at our homes.
"They were armed with guns, knives, machetes and explosives.
"They slaughtered [and] butchered women, children and old people who could not escape."
The local government condemned the "barbaric" attacks but the chairman of a local group of evangelical churches, Rev. Zachariah Gado, said the attackers were escaping justice.