NAIROBI (Reuters) - The son of Kenya's founding president, Uhuru Kenyatta, won a presidential election with a slim margin of 50.03 percent of votes cast, provisional figures displayed by the election commission on a screen showed on Saturday.

Kenyatta, who faces international charges of crimes against humanity, secured 6,173,433 votes out of a total of 12,338,667 ballots cast, indicating that he had secured the more than 50 percent of votes needed for a first round win.

(Reporting by George Obulutsa and James Macharia; Writing by Edmund Blair)