Unarmed men marched through the streets waving sticks and chanting "No Raila, no peace" in support of opposition leader Raila Odinga who is behind Kenyatta by a margin of 1.4 million ballots.
Kerry says Kenya's leaders need to step up in the coming days and give people confidence amid fears of post-election violence.
Kenyan police opened fire Wednesday to disperse riots and protests in several areas after presidential candidate Raila Odinga made allegations of election fraud.
Reuters news agency reports Mr. Odinga claimed most of more than 20,000 polling station result forms uploaded to the election commission's website were fake, doubling down on previous claims of "massive" fraud in Tuesday's presidential election. "But we believe that the election's commission in Kenya has put together a process that will allow each and every vote's integrity to be proven", Kerry said, adding that there were "little aberrations here and there". Although limited irregularities have been reported, there are no indications that the election was rigged. "Force should only be used as a last resort, and even then only the bare minimum to prevent loss of life", said Muthoni Wanyeki, Amnesty International's regional director for East Africa, the Horn and the Great Lakes. At least left five people have died in clashes between protesters and the police.
Nearly 19.6 million Kenyans went to vote in the presidential poll, resulting in large queues forming outside voting stations throughout the day.
Chebukati also dismissed the opposition's call that Odinga be declared the victor, saying the final result will only be announced once all the forms from all constituencies had arrived at the tallying center in Nairobi and been validated. "There were no signs of centralised or localised manipulation", Schaake told reporters during the release of preliminary statement by foreign election observer missions.
The Intergovernmental Authority on Development (IGAD), the African Union, the European Union and the African Electoral Observation Group had earlier said the election was credible.
"We have caught them".
Odinga also ran as the opposition candidate in the 2013 election.
"We do not want to see any violence in Kenya", he said.
Business is still slow in Nairobi 48 hours after the disputed election results were announced as many remain fearful of the aftermath.
"I haven't heard what the Opposition says... on what basis their complaint would be".
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