Vote counting has started in parts of Nigeria after millions of voters took part the country's presidential elections.

The current president, Muhammadu Buhari, is seeking a second term, in what's thought to be a tight race with former Vice President Atiku Abubakar. Attacks in the northeast blamed on the armed group Boko Haram slowed voting on Saturday.

But the main concern remains last week's postponement of the election and how that could affect turnout.

Al Jazeera's Ahmed Idris reports from Maiduguri in Nigeria's Borno state.

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