LAGOS - Gunmen overnight raided a northern Nigerian town with a history of sectarian violence and killed at least nine people, a traditional leader said Sunday. “We are going round the town checking. So far we have nine people dead and 12 wounded,” Bukata Zhyadi, a traditional ruler of the mainly Christian Sayawa ethnic group, told AFP. He blamed the attack in Tafawa Balewa in Bauchi state on the Muslim Hausa-Fulani ethnic group. He said the attackers hurled home-made hand grenades into houses while people were sleeping and shot at those trying to escape.