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Sunday Alamba, Associated Press
People displace by Islamist militants display their voters card, during the Presidential and National assembly elections, in Yola, Nigeria, Saturday, March 28, 2015. Nigerians went to the polls Saturday in presidential elections which analysts say will be the most tightly contested in the history of Africa's richest nation and its largest democracy.

ABUJA, Nigeria — A Nigerian official says voting is being extended to Sunday in areas that have experienced problems in checking voters' identities.

Kayode Idowu, spokesman of the Independent National Electoral Commission, told The Associated Press Saturday that voting will continue for another day in some areas where machines were not reading biometric voting cards. He said those areas include Lagos, Nigeria's largest city on the Atlantic Ocean.