Dozens of people were killed in a suicide bombing innorthern Nigeria, the Defence Ministry said Tuesday. A suicide bomber exploded one of four car bombs in the village of Mulai, near Bornostate capital Maiduguri, according to spokesman Chris Olukolade.Three further suicide bombers were shot dead by soldiers before they could set offtheir explosives, said Olukolade.The explosion killed several civilians and soldiers, but the exact number of deathswas yet to be determined, he added.