Suicide bomb blast and rocket-grenade attacks kill dozens in separate incidents in Maiduguri in troubled north-east of countryA suicide bomb blast outside a mosque and rocket-propelled grenades that exploded into homes as people slept have killed at least 30 people in the Nigerian city of Maiduguri, residents and officials said.The explosion killed people who were prostrating themselves for afternoon prayers outside the mosque, including traders from the nearby crowded marketplace in the largest city in Nigeria’s troubled north-east, survivors said.