Riot police officers control supporters of Kenyan opposition leader Raila Odinga of the National Super Alliance (NASA) coalition from accessing the Jomo Kenyatta airport upon his return in Nairobi, Kenya on November 17, 2017. (Photo by Baz Ratner/Reuters)





Policemen attempt to disperse supporters of Kenyan opposition leader Raila Odinga of the National Super Alliance (NASA) coalition along Likoni road as they are repulsed from accessing city center, in Nairobi, Kenya on November 17, 2017. (Photo by Thomas Mukoya/Reuters)





Kenyan opposition supporters follow leader Raila Odinga of the National Super Alliance (NASA) upon his return in Nairobi, Kenya, Friday, November17, 2017. Kenyan police have used tear gas and water cannons to disperse supporters of opposition leader Raila Odinga who are trying to gather near the country's main airport and Uhuru park to welcome him back from an overseas trip. The supporters are responding to a call to welcome Odinga after speaking engagements in the United States and Britain over Kenya's political turmoil following a court-nullified presidential election and the fresh vote last month. (Photo by Brian Inganga/AP Photo)





Kenyan opposition leader Raila Odinga of the National Super Alliance (NASA) coalition is welcomed by his supporters upon his return in Nairobi, Kenya on November 17, 2017. (Photo by Baz Ratner/Reuters)





Water is sprayed by policemen to disperse supporters of Kenyan opposition leader Raila Odinga in Nairobi, Kenya on November 17, 2017. (Photo by Thomas Mukoya/Reuters)





Anti-riot police fire tear gas to disperse supporters of Kenyan opposition National Super Alliance (NASA) coalition in Nairobi, Kenya on November 17, 2017. (Photo by Baz Ratner/Reuters)





Police condon off Uhuru Park to prevent opposition supporters from entering the park, in Nairobi, Kenya, Friday, November 17, 2017. (Photo by Sayyid Abdul Azim/AP Photo)





A supporter of Kenyan opposition leader Raila Odinga is sprayed with water by police in Nairobi, Kenya on November 17, 2017. (Photo by Baz Ratner/Reuters)





An injured supporter of Kenyan opposition leader Raila Odinga receives assistance in Nairobi, Kenya on November 17, 2017. (Photo by Baz Ratner/Reuters)





A supporter of Kenyan opposition National Super Alliance (NASA) coalition lies on the road after being shot dead by police in Nairobi, Kenya, Friday, November 17, 2017. (Photo by Brian Inganga/AP Photo)





Supporters of Kenyan opposition National Super Alliance (NASA) coalition throw stones at police in Nairobi, Kenya on November 17, 2017. (Photo by Baz Ratner/Reuters)





Kathiani Member of Parliament Robert Mbui rolls to safety after he was hit by another car as riot police dispersed the convoy of Kenyan opposition leader Raila Odinga of the National Super Alliance (NASA) coalition, upon Odinga's return to Nairobi, Kenya on November 17, 2017. (Photo by Thomas Mukoya/Reuters)





An injured supporter of Kenyan opposition National Super Alliance (NASA) coalition walks after he clams he was stabbed during clashes in Nairobi, Kenya on November 17, 2017. (Photo by Baz Ratner/Reuters)





A man makes his way through rising tear gas fired by riot police officers to disperse supporters of Kenyan opposition leader Raila Odinga in Nairobi, Kenya on November 17, 2017. (Photo by Baz Ratner/Reuters)





Riot police use stones to disperse the convoy of Kenyan opposition leader Raila Odinga of the National Super Alliance (NASA) coalition as they attempt to access the Uhuru Park grounds upon his return in Nairobi, Kenya on November 17, 2017. (Photo by Thomas Mukoya/Reuters)





An anti-riot police officer fires tear gas to disperse supporters of Kenyan opposition National Super Alliance (NASA) coalition in Nairobi, Kenya on November 17, 2017. (Photo by Baz Ratner/Reuters)





A supporter of Kenyan opposition leader Raila Odinga of the National Super Alliance (NASA) coalition reacts as he attempts to access the Jomo Kenyatta airport upon Odinga's return in Nairobi, Kenya on November 17, 2017. (Photo by Baz Ratner/Reuters)





Anti-riot police fire live bullets into the air to disperse supporters of Kenyan opposition National Super Alliance (NASA) coalition in Nairobi, Kenya on November 17, 2017. (Photo by Baz Ratner/Reuters)





The driver to Kathiani Member of Parliament Robert Mbui secures his damaged car after he was hit by another vehicle as riot police dispersed the convoy of Kenyan opposition leader Raila Odinga of the National Super Alliance (NASA) coalition in Nairobi, Kenya on November 17, 2017. (Photo by Thomas Mukoya/Reuters)





Anti-riot police fire tear gas to disperse supporters of Kenyan opposition National Super Alliance (NASA) coalition in Nairobi, Kenya on November 17, 2017. (Photo by Baz Ratner/Reuters)





Supporters of Kenyan opposition National Super Alliance (NASA) coalition clash with police officers in Nairobi, Kenya on November 17, 2017. (Photo by Thomas Mukoya/Reuters)





Policemen spray water to disperse supporters of Kenyan opposition leader Raila Odinga in Nairobi, Kenya on November 17, 2017. (Photo by Thomas Mukoya/Reuters)





Kenya riot police chase and prepare to strike a supporter of Kenyan opposition National Super Alliance (NASA) coalition in Nairobi, Kenya, Friday, November 17, 2017. One person has been killed in confrontations between Kenyan police and supporters of opposition leader Raila Odinga as tensions over the disputed presidential election continue. Police fired live rounds and tear gas to prevent Odinga's convoy from making its way to Nairobi's main park so he could address supporters. (Photo by Khalil Senosi/AP Photo)





Policemen attempt to disperse supporters of Kenyan opposition leader Raila Odinga of the National Super Alliance (NASA) coalition upon his return in Nairobi, Kenya on November 17, 2017. (Photo by Baz Ratner/Reuters)





Supporters of Kenyan opposition leader Raila Odinga throw rocks during protests in Nairobi, Kenya on November 17, 2017. (Photo by Thomas Mukoya/Reuters)





Supporters of Kenyan opposition National Super Alliance (NASA) coalition set tires on fire in Nairobi, Kenya on November 17, 2017. (Photo by Baz Ratner/Reuters)