President Buhari was declared the victor by the Independent National Electoral Commission (INEC) with Atiku saying that he was robbed of victory.
Although voting was mostly peaceful a local election observer was killed by a stray bullet as police attempted to disperse demonstrators in southeastern Enugu state.
During the presidential and parliamentary polling, there were reports of violence, vote-buying, voter intimidation and ballot box vandalism in some states. Violence and irregularities have already been registered by official and unofficial monitors. Despite the postponement, voting was disrupted by malfunctioning voter card readers which caused lengthy delays in some regions, particularly southern opposition strongholds.
Heavy military deployment was reported in Rivers state in Nigeria's restive south. They were later released unharmed.
State governors are usually hotly contested seats being among the nation's most powerful political offices, with some running budgets larger than those of smaller African nations.
They can also provide a strong collective voice in Abuja.
The election is for 29 of the country's 36 governors, who are among the most influential politicians in Nigeria, which is Africa's biggest oil producer and has the continent's largest economy.
Nigerians Elect State Governors Amid Concerns Over Violence
"Most of governance functions at the state level where it has the most impact on people's lives", he said.
State-level elections are often predicted to broadly mirror presidential polling and this year come amid concerns about the role of security forces during the vote. But initial indications were of a low turn-out, with the military blamed as well as voter apathy after a disorganised and delayed presidential vote in February.
Abubakar rejected the result, saying there was massive rigging and has asked the election tribunal to review the vote.
"But what we are witnessing today are signs of eroding faith in the democratic order".
The Situation Room said last month's poll did not meet the minimum standard for a credible election, although most domestic and global observers disagreed.
Because Buhari's APC has been banned from fielding a gubernatorial candidate in Rivers as a result of internal party disputes, it's supporting the African Action Congress against the PDP.
That prompted the two main parties to accuse each other of conspiring to rig the result.
"Voter turnout remains low", the Situation Room, a monitoring mission comprising over 70 civic groups, said of Saturday's vote in a statement.
Imran Khan: Won't let armed groups function in Pakistan
Pakistan faces growing worldwide pressure to rein in Islamist groups that carry out attacks in neighbouring India . The next day, Islamabad captured an Indian Air Force pilot after a dogfight between the two air forces.
The scam , said prosecutors, arranged for children to be recruited as athletes, regardless of their athletic abilities. One of the cooperating witnesses in the scheme was Rudy Meredith, the head coach of the women's soccer team at Yale.
With the acquisition, the of Nvidia and Mellanox will have "every major cloud service provider and computer maker" as a customer. Both Bloomberg and Reuters write that Nvidia will hand over the huge sum-the most it's ever paid for a purchase-later today.
That reentry appeared to go as planned, with the spacecraft first deploying two drogue parachutes followed by its four main ones. The splashdown is the last act in what has been a successful first flight for the Crew Dragon .
The company originally filed for Chapter 11 bankruptcy protection in early February, outlining a plan to close 94 stores. Payless ShoeSource and clothing retailer Gymboree both have followed that path to recent months.
Her lawyer, Tasnime Akunjee, told the Guardian: "We have strong but as yet unconfirmed reports that Shamima Begum's son has died". Ms Begum said she had previously lost two other children and named her new son Jarrah after her firstborn.
Last month Avenatti said he had uncovered videotape of Kelly having sex with a 14-year-old girl multiple times. Kelly turns himself in at 1st District police headquarters in Chicago on Friday night, February 22, 2019.
These stunning stories led to the singer being charged with 10 counts of aggravated criminal sex abuse. Saturday Night Live kicked off its latest episode with a parody of R Kelly's CBS interview this week.
The Antonio Brown saga rages on, as the Pittsburgh Steelers continue to look for trade partners for their embattled star. Meanwhile, ESPN's Dianna Russini reported that the Green Bay Packers also might have interest in acquiring Brown.
Michael Cohen , the former personal lawyer and fixer for President Donald Trump , sued the Trump Organization on Thursday. Cohen came under renewed scrutiny after telling Congress that he never sought a pardon from the president.
Captain Marvel brought in around $154 million dollars in its domestic opening weekend, according to Deadline . T here is great news for all Marvel Cinematic Universe fans-Captain Marvel is out already.
The next day Pakistani aircraft shot down at least one Indian aircraft and captured its pilot after it violated the airspace. But Khan said there was a huge desire to build a peaceful and stable Pakistan.
Browns acquire Beckham from NY
He signed with Cleveland after he was released by the Ravens three years after the team took him with a first-round pick. Instead, they've done a very good job assembling some cheaper talent to put around Josh Allen.
Broncos will face Antonio Brown twice in 2019
The Oakland Raiders made the biggest splash of the 2019 National Football League offseason when they traded for Antonio Brown . Prior to that, he played five seasons with the Patriots and was a member of two Super Bowl championship teams.
DeSean Jackson Traded from Buccaneers, Headed Back to Philly
Reports indicate the Bucs will get back a 2019 6th round pick and the Eagles will get the Bucs' 2019 7th round pick in the deal. Jackson was set to make $10 million for the Bucs in 2019 with a full $10 million cap hit, but no dead money if released.
Rory McIlroy seven shots off lead at Arnold Palmer Invitational
World number 34 Cabrera Bello is seeking his first victory on the PGA Tour , though he has won three times on the European Tour. Finnish never says such a thing until the ball actually returns to Earth, but he had a hunch on this one, and he was right.
It's official! Jennifer Lopez, A-Rod are engaged
American singer Jennifer Lopez and former New York Yankees player Alex Rodriguez announced Saturday night that they are engaged . There's no word on a wedding date, but Lopez has a United States tour scheduled to start June 7 and go until July 26.
Number of injured in Kashmir blast rises to 26
After Thursday's attack, former Jammu and Kashmir chief minister and National Conference leader Omar Abdullah tweeted, "Tragic". Riyaz was injured in the blast at the General bus stand, succumbed at a hospital early Friday around 1:15 am, reports said.
Lakers, LeBron agree to minutes restriction
Despite James' 17 points, the Lakers trailed powerful Denver 66-49 at halftime, seemingly headed to their fourth straight loss. It was one of many great plays that LeBron has made during his career, but it was also one of many shots that he's taken.