"The men, 21 of them, were stopped at Bultaram (village) by gunmen we believe are Boko Haram who shot them dead," said Baba Nuhu, an official with the Gujba local government in Yobe state.
Nuhu and Haruna Malam, the brother of one of the victims, spoke to AFP from Yobe's capital Damaturu, where many Gujba residents have fled to seek refuge from Boko Haram violence.