Gunmen massacred at least 26 people in a student housing area of north-east Nigeria on Tuesday, calling victims out by name before shooting them or slitting their throats, officials said. The attack occurred in the early hours in the town of Mubi, where the military last week carried out a high-profile raid against Islamist extremist group Boko Haram, which has been waging a deadly insurgency. Some officials, however, suggested the massacre may have been linked to a recent student election.