(Reuters) – At least 35 people, most of them students, were killed when a bomb ripped through a school assembly in Nigeria’s northeastern town of Potiskum on Monday, a hospital official said. No one immediately claimed responsibility for the attack in Yobe State, a territory that has been hit by Sunni Muslim Boko Haram rebels during a five-year insurgency seen as the main security threat to Africa’s leading oil producer. Mariam Ibrahim, a teacher at […]