Buhari, who was defeated by Goodluck Jonathan in the first year of 2015, was defeated by nearly four million votes in the election results of the Independent Electoral Commission (INEC), Abuja, Nigeria.
While the Boards of the Progressive Congresses Meeting (APC) 15,191,847 (56%) and Abubakes received 11.262,978 (41%) votes in the weekend elections, the board said Tuesday the counting of bytes ended.
Abubakar, the Democratic People's Party (PDP), called for electoral results to call the electoral process "militarized" and called "disadvantage" to Nigeria's democracy.
"I lost to a fair and fair election, I named the winner in the wise of my victory, not only for my congratulations, but also for the service that I had attached to Nigeria, because it was a bridge between North and North," said Abubakar.
He added: "I did not say it would be the result of the 2016 elections of 2016 and the prosecution in the court".
Abubakar, vice president of 1999 to 2007, has been president four times. His candidacy was deduced from corruption in allegations since he was in his office, allegedly denied allegations.
Buhari won Aticuk in 36 countries in the United States in 17 states and Abuja capital.
Africa's biggest democracy was never easy, but Nigeria's election was bad logistics deals. The Electoral Commission moved a week's presidential election, one hour earlier.
On the same day, reports of voters' fears were received, voting polls and at least one voting paper held at one place. Nigerian polling stations waited several hours for voters to appear throughout the country.
As a result, most of the votes were apathy, because it was part of the 20-year-old Nigerian voters. The INEC voted for 27 million votes from 84 million registered voters.
Lagos, a vast mega-population of almost 20 million people, voted only 1.1 million people, according to INEC.
Electoral collection was 35.6%, the election commission said, compared to 44 points in the 2015 elections.
The Situation Room, referring to SBM Intelligence Analysis data, said that most of the deaths occurred in the southern oil wealth.
But despite the violence, the observers of the International Republican Institute and the International Institute (IRI / NDI) said deaths should be tragic, even in a broader context.
"We do not want excessive death," said IRI in John Tomaszewski's CNN Monday.
"We understand the contextual relationship, violence is happening every day here, it's just electoral day."
Buhari was a chief golfer in 1983 when he came to power early 20 months later in another blow.
He served for three consecutive years from 2003 to 2011, and was elected four years earlier as the first opposition candidate to defeat the Nigeria operator.
Buhari allegedly opposed endemic corruption and refused to be a Boko Haram terrorist group.
Buhari is now recovering an unstable economy that had an impact on the price crisis of oil, up to $ 40 at a height of $ 100.
Buhari has also had to show the Nigerian people behind their health problems.