Raila Odinga filed his appeal against Kenya's presidential election results to the Supreme Court Saturday, accusing election officials of manipulation.
Prime Minister Odinga lost to his deputy Uhuru Kenyatta 43.28 percent to 50.7 percent during the March 4 elections, dodging a runoff vote by a mere 8,100 votes, BBC News reported.
"I have no hesitation whatsoever in lawfully challenging the election outcome," Odinga told reporters outside his Nairobi offices, according to BBC. "These failures dwarf anything Kenyans have ever witnessed in any previous election,"
Odinga supporters gathered outside the Supreme Court to show their solidarity, but were dispersed with tear gas for not heeding warnings to not assemble, according to UPI News.
"We are going to allege fraud," James Orengo, a senior official in Odinga's CORD coalition, said. "There was collusion between the IEBC (Electoral and Boundaries Commission) and (Kenyatta's party) TNA. They entered into some sort of fraudulent enterprise and we are going to be able to show that," All Africa reported.
Kenyatta and his running mate William Ruto are also facing charges in the International Criminal Court for inciting violence during the country's last elections in 2007.
This month's vote was, in contrast, much more peaceful, in part due to Odinga's urging his supporters not to revolt in the streets, according to Reuters.
“We can not begin what is supposed to be a new era under a new constitution in the same old ways,” he said.
More from GlobalPost: In Kenya, the biggest election winner is peace
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