Nigeria presidential election could be delayed in some areas: sources

Nigeria's presidential election set for Saturday is now expected to be delayed in parts of the country, two diplomats and a government source said on Friday, citing difficulties in transporting electoral materials in some areas. President Muhammadu Buhari faces a tight election contest in Africa's largest economy, top oil producer and most populous nation against the main opposition candidate, businessman and former vice president Atiku Abubakar. An official of the Independent National Electoral Commission (INEC) told Reuters that "some result sheets and some ballot papers are reportedly missing.