Protests flared in opposition bastions as soon as President Uhuru Kenyatta was declared the victor last night after an election his rival Raila Odinga claimed was massively rigged.
Clashes erupted at opposition stronghold Kisumu alongside other slums as Raila Odinga's supporters joined their candidate to decry fraud.
More than 1,000 people died and 600,000 were evicted from their homes, while global observers called the vote flawed.
Kenyatta, the 55-year-old son of Kenya's first president after independence from Britain, appealed for calm and unity. Those charges were dropped due to lack of evidence, with the ICC prosecutor blaming unprecedented witness interference and bribery.
Opposition officials have criticized these observers arguing that they had close relations with President Uhuru Kenyatta.
In statement issued shortly after the Independent Electoral and Boundaries Commission announced Kenyatta as victor of the 8 August general election, Museveni said he is confident that his counterpart Kenyatta will continue with the efforts of promoting unity and development of Kenyans.
Kenyans resumed normal activities on Saturday after several weeks of election tension across the country. Then the American CEO of a campaign data firm working with Odinga was deported the weekend before the vote. "They should prioritize dialogue and de-escalation, and only use force and firearms if all peaceful means fail, and only where necessary to protect life", said Muthoni Wanyeki.
The deaths were confirmed by regional police commander Leonard Katana, AP reports. Another at least two deaths were reported overnight after Kenyatta was declared the victor.
The election was a test of the stability of the East African economic power as many recalled the postelection bloodshed a decade ago that left more than 1,000 dead.
A government official told reporters another man was killed in Kisumu county, centre of serious post-election ethnic violence in 2007 in which 1,200 people were killed and 600,000 displaced.
"We are exhausted of being ruled by Kikuyus", said Wycliffe Onyalo, 25, who was demonstrating in favor of Odinga on Friday morning on the main street of Kibera, before the results were announced.
In protests by the opposition in Kenya which has continued into Saturday, three people, including a child, have been shot dead.
Odinga alleged that hackers infiltrated the election commission's computer system in favor of his opponent.