The election sparked days of sporadic protests in which at least 28 people were killed.
The vote had raised fears of major political violence - as was the case after a disputed election in 2007.
THE GUARDIAN: Kenya’s supreme court has nullified Uhuru Kenyatta’s win in the presidential election last month and ordered a new vote within 60 days.
The six-judge bench ruled 4-2 in favour of a petition filed by the opposition candidate Raila Odinga, who claimed that the electronic voting results were hacked into and manipulated in favour of the incumbent. Kenyatta had won a second term with 54% of the vote.
“The declaration [of Kenyatta’s win] is invalid, null and void,” said the judge David Maranga, announcing the verdict. The court did not place any blame on Kenyatta or his party.
Odinga said: “It’s a very historic day for the people of Kenya and by extension the people of Africa. For the first time in the history of African democratisation, a ruling has been made by a court nullifying [the] irregular election of a president. This is a precedent-setting ruling.”
Lawyers for Kenyatta described the nullification as a “very political decision” but said they would live with the consequences.
Odinga’s lawyer had asked the court to invalidate Kenyatta’s win, saying scrutiny of the forms used to tally the votes found anomalies that affected nearly 5 million votes.
Kenya’s electoral commission has said there was a hacking attempt but that it failed. International election observers have said they saw no interference with the vote.