Kenyan opposition leader Raila Odinga Odinga last week described the outcome of the August 9 vote and its handling by the Independent Electoral and Boundaries Commission as a "travesty".

Last week the election commissioner declared Deputy President William Ruto had won the election by a slim margin.
Last week the election commissioner declared Deputy President William Ruto had won the election by a slim margin. (Reuters)

Kenya's veteran opposition leader Raila Odinga has filed a challenge to the results of this month's presidential election in the Supreme Court, his legal team said, sharpening a political clash that has gripped East Africa's powerhouse. 

"What we did this morning is to file the online copy," lawyer Daniel Maanzo told Kenyan television channel on Monday. "After today there will be four days for the other parties to reply." 

A source at the judiciary confirmed they had received a copy of the file. 

Last week the election commissioner declared Deputy President William Ruto had won the election by a slim margin, but four out of seven election commissioners dissented, saying the tallying of results had not been transparent.

Last week Odinga said the results were a "travesty" but said he would settle the dispute in court and urged supporters to remain peaceful. 

READ MOREKenya's Raila Odinga vows to contest 'joke' election in court

This is Odinga's fifth stab at the presidency; he blamed several previous losses on rigging. Those disputes triggered violence that claimed more than 100 lives in 2017 and more than 1,200 lives in 2007. 

In 2017, the Supreme Court overturned the election result and ordered a re-run, which Odinga boycotted, saying he had no faith in the election commission. 

This time, Odinga is backed by the political establishment. President Uhuru Kenyatta endorsed Odinga's candidacy after falling out with Ruto after the last election. 

READ MORE: All legal options on the table, Kenya's Odinga stresses after election loss

Seven-member court

The case will be heard by the seven-member Supreme Court and presided over by Martha Koome, Kenya's first female chief justice, who was appointed by Kenyatta last year.

The court will next conduct a status conference with all parties to define the hearing schedule and ground rules.

The constitution requires judges to issue their decision within 14 days of the lawsuit being filed.

Due to the tight schedule, it normally issues a summary judgment within 14 days, followed by more thorough decisions from each of the seven judges at a later date.

At stake is control of East Africa's wealthiest and most stable nation, home to regional headquarters for firms like General Electric, Google, and Uber. 

Kenya also provides peacekeepers for neighbouring Somalia and frequently hosts peace talks for other nations in the turbulent East Africa region.

Source: Reuters