By Our Reporter
Provisional results suggest that William Ruto is ahead of Raila Odinga in the toughest race for Kenya's next President.
With more than 90% of results posted from thousands of individual districts, local tallies of the raw data suggest at least that thousands of votes separate the pair with Ruto being in the lead.
Turnout is estimated at around 64%, well short of the 80% in the last election five years ago.
However, electoral commission head Wafula Chebukati has said this figure will go up once data comes in about voters who were verified manually, instead of via an electronic ID kit.
A largely peaceful election day was marred by logistical delays and a failure of these identification kits in some parts of the country.
At his latest briefing, Mr Chebukati said the commission had received 97% of presidential results sent in electronically, but official tallying would not begin until the physical results were received for verification.
He also referred to one of the incidents of violence reported on voting day involving an MP who is on the run for allegedly shooting dead his rival's bodyguard at a polling station.
"A murder case is a matter to be dealt with by the police, the law will take its course and justice will be served," he said.
Baba v Hustler
The two frontrunners in the presidential race are seasoned politicians.
Odinga, 77 - a long-serving opposition leader, nicknamed Baba ("father") by his supporters - is running for president for a fifth time. Mr Ruto, 55, who has tried to emphasise his connection with ordinary Kenyans by calling himself a "hustler", is taking his first stab at the presidency.
Two other candidates - David Mwaure and George Wajackoya - are also in the race.
Outgoing President Uhuru Kenyatta is backing Odinga, a foe turned ally, to succeed him, after a falling out with Ruto.
To win the presidential race in the first round, a candidate needs:
- more than half of all the votes cast across the country
- at least 25% of the votes cast in a minimum of 24 counties.
After counting the votes, local officials take a photo of the final tally sheet and send the image to both the constituency and national tallying centres.
The media, political parties and civil society groups have been compiling their own tallies using these final results declared at the more than 40,000 polling stations.
But only the electoral commission can declare the winner of the presidential election after verifying the physical and digital forms sent to the national tallying centre.
It has seven days to announce the result.