The announcement came after opposition leader Raila Odinga accused Mr Kibaki of electoral fraud and called for a full re-assessment of the results.
Opposition protesters began riots in the capital Nairobi, just minutes after the announcement.
The count was badly delayed, sparking violence in which at least 10 people are reported to have been killed.

A new European Union force and UN mission set to deploy in Chad are mandated to protect aid groups assisting hundreds of thousands of people, amid violence by armed bandits, militias, rebels, soldiers and some foreign fighters. But humanitarian officials in Chad are concerned that if the mission does not remain distinct and separate from relief efforts it risks undermining them.
Kenya's main opposition party has declared victory in the country's presidential election, despite continued delays in announcing official returns.
BY JARVIS MARCUS
Trans-continental partnership gives “Bair Hugger”
- As it has been approved many times before, this new report shows immigrants contribute more both federal & State while consuming less on social services-Here are some of the excerpts of that report -
By Staff Writer
By Edmund Sanders
The African Union has stressed that the grave situation in Somalia represents one of the most serious challenges facing the continent.
South Africa's National Prosecuting Authority says a decision on whether to prosecute newly elected African National Congress party president Jacob Zuma is imminent. VOA's Delia Robertson reports from Johannesburg the announcement came as Zuma was preparing to deliver his first speech as ANC leader.
The board of directors of League of Women Voters of Minnesota announced that Keesha Gaskins is the new executive director of the League and the League of Women Voters of Minnesota Education Fund. She begins work Monday.
By Bashe Said