Army spokesman Col. Sagir Musa earlier said there had not been any attack on Maiduguri, but there had been an exercise by the military.
Despite both sides' bullishness, it was hard to assess from unofficial results announced at individual polling units who was in front.
Vice president Yemi Osinbajo lost his polling unit in Victoria Garden City to Alhaji Atiku Abubakar, the presidential candidate of the PDP.
In Twitter posts, the Nigeria Civil Society Situation Room said many polling stations are late in opening because of several problems including missing stamps, the late arrival of polling officials and faulty card readers.
Domestic and global observers to the Nigerian presidential elections were present at polling stations in Yola and Abuja.
She reported that she cast her vote at a polling station in Asokoro, Abuja, before the ballots were mistakenly transported to a different location, where officials from Nigeria's Independent National Election Commission (INEC) tried to nullify them.
Nigerian election officials display ballots to the public as people line up to cast their vote in Kaduna, Nigeria.
Desalegn observed this while leading a team of observers to some polling units in the FCT and said there were a number of observers in major geographic regions across the country.
Boko Haram and Islamic State West Africa Province have carried out deadly sporadic raids in Borno state.
Vietnam announces traffic ban for possible Kim Jong Un summit arrival route
The North Koreans returned to the guesthouse at around 2:40 p.m., suggesting the discussions lasted up to five and half hours. The barber is not the only artist in Hanoi paying tribute to the leaders.
However, he won his polling unit in Eziama Obaire in Nkwerre Local Government Area of the state for Buhari with 711 against PDP candidate Atiku Abubakar's 50 votes.
After this exhausting week following the postponement of the vote, initially scheduled for 16 February, but postponed a few hours before the start of the vote by the Electoral Commission, tension has mounted a notch in the most populous country in Africa. which is also its first economy and one of the largest oil producers in the world.
Warning the INEC chairman not to change the results of the presidential elections, PDP said, "The PDP calls on INEC Chairman, Prof".
He previously pledged to accept the results of the election, provided they are credible.
Abbas also declared APC House of Representatives' candidate after polling 18, 029 to defeat PDP's candidate who scored 8,262 votes.
President Muhammadu Buhari was among the country's first voters and told reporters he is ready to congratulate himself.
The president "has failed", said David Ojo, a barber in Danbatta in northern Kano state who joined excited voters in supporting Buhari in 2015.
Some of the country's 72.8 million eligible voters were frustrated by delays. "So why will I kill myself or waste my time?"
Those who turned out, however, dismissed concerns about having to wait.