NAIROBI, KENYA - NOVEMBER 17: Supporters of political opposition leader Raila Odinga who are trying to gather near the country's main airport and Uhuru park to welcome Odinga back from an overseas trip, clash with Kenyan police in Nairobi, Kenya on November 17, 2017. Kenyan police used tear gas and water cannons to disperse supporters.

NAIROBI, KENYA - NOVEMBER 17: Supporters of political opposition leader Raila Odinga who are trying to gather near the country's main airport and Uhuru park to welcome Odinga back from an overseas trip, carry a man,died during clashes with Kenyan police in Nairobi, Kenya on November 17, 2017. Kenyan police used tear gas and water cannons to disperse supporters.

NAIROBI, KENYA - NOVEMBER 17: Supporters of political opposition leader Raila Odinga who are trying to gather near the country's main airport and Uhuru park to welcome Odinga back from an overseas trip, clash with Kenyan police in Nairobi, Kenya on November 17, 2017. Kenyan police used tear gas and water cannons to disperse supporters.

NAIROBI, KENYA - NOVEMBER 17: Supporters of political opposition leader Raila Odinga who are trying to gather near the country's main airport and Uhuru park to welcome Odinga back from an overseas trip, carry a man,died during clashes with Kenyan police in Nairobi, Kenya on November 17, 2017. Kenyan police used tear gas and water cannons to disperse supporters.

NAIROBI, KENYA - NOVEMBER 17: Kenyan police intervene to supporters of political opposition leader Raila Odinga who are trying to gather near the country's main airport and Uhuru park to welcome Odinga back from an overseas trip, clash with Kenyan police in Nairobi, Kenya on November 17, 2017. Kenyan police used tear gas and water cannons to disperse supporters.

NAIROBI, KENYA - NOVEMBER 17: Kenyan police intervene to supporters of political opposition leader Raila Odinga who are trying to gather near the country's main airport and Uhuru park to welcome Odinga back from an overseas trip, clash with Kenyan police in Nairobi, Kenya on November 17, 2017. Kenyan police used tear gas and water cannons to disperse supporters.

NAIROBI, KENYA - NOVEMBER 17: Supporters of political opposition leader Raila Odinga who are trying to gather near the country's main airport and Uhuru park to welcome Odinga back from an overseas trip, clash with Kenyan police in Nairobi, Kenya on November 17, 2017. Kenyan police used tear gas and water cannons to disperse supporters.

NAIROBI, KENYA - NOVEMBER 17: Kenyan police intervene to supporters of political opposition leader Raila Odinga who are trying to gather near the country's main airport and Uhuru park to welcome Odinga back from an overseas trip, clash with Kenyan police in Nairobi, Kenya on November 17, 2017. Kenyan police used tear gas and water cannons to disperse supporters.

NAIROBI, KENYA - NOVEMBER 17: Kenyan police intervene to supporters of political opposition leader Raila Odinga who are trying to gather near the country's main airport and Uhuru park to welcome Odinga back from an overseas trip, clash with Kenyan police in Nairobi, Kenya on November 17, 2017. Kenyan police used tear gas and water cannons to disperse supporters.

NAIROBI, KENYA - NOVEMBER 17: Kenyan police intervene to supporters of political opposition leader Raila Odinga who are trying to gather near the country's main airport and Uhuru park to welcome Odinga back from an overseas trip, clash with Kenyan police in Nairobi, Kenya on November 17, 2017. Kenyan police used tear gas and water cannons to disperse supporters.

NAIROBI, KENYA - NOVEMBER 17 : A man yields as supporters of political opposition leader Raila Odinga who are trying to gather near the country's main airport and Uhuru park to welcome Odinga back from an overseas trip, clash with Kenyan police in Nairobi, Kenya on November 17, 2017. Kenyan police used tear gas and water cannons to disperse supporters.

NAIROBI, KENYA - NOVEMBER 17: Supporters of political opposition leader Raila Odinga who are trying to gather near the country's main airport and Uhuru park to welcome Odinga back from an overseas trip, clash with Kenyan police in Nairobi, Kenya on November 17, 2017. Kenyan police used tear gas and water cannons to disperse supporters.

NAIROBI, KENYA - NOVEMBER 17: Political opposition leader Raila Odinga is welcomed by his supporters after his coming back from an overseas trip, in Nairobi, Kenya on November 17, 2017.

NAIROBI, KENYA - NOVEMBER 17: Supporters of political opposition leader Raila Odinga who are trying to gather near the country's main airport and Uhuru park to welcome Odinga back from an overseas trip, clash with Kenyan police in Nairobi, Kenya on November 17, 2017. Kenyan police used tear gas and water cannons to disperse supporters. ( Bryan Jaybee - Anadolu Agency )

NAIROBI, KENYA - NOVEMBER 17: A man is injured as supporters of political opposition leader Raila Odinga who are trying to gather near the country's main airport and Uhuru park to welcome Odinga back from an overseas trip, clash with Kenyan police in Nairobi, Kenya on November 17, 2017. Kenyan police used tear gas and water cannons to disperse supporters.

NAIROBI, KENYA - NOVEMBER 17: A man is injured as supporters of political opposition leader Raila Odinga who are trying to gather near the country's main airport and Uhuru park to welcome Odinga back from an overseas trip, clash with Kenyan police in Nairobi, Kenya on November 17, 2017. Kenyan police used tear gas and water cannons to disperse supporters.

NAIROBI, KENYA - NOVEMBER 17: Kenyan police intervene to supporters of political opposition leader Raila Odinga who are trying to gather near the country's main airport and Uhuru park to welcome Odinga back from an overseas trip, clash with Kenyan police in Nairobi, Kenya on November 17, 2017. Kenyan police used tear gas and water cannons to disperse supporters.

NAIROBI, KENYA - NOVEMBER 17: Supporters of political opposition leader Raila Odinga who are trying to gather near the country's main airport and Uhuru park to welcome Odinga back from an overseas trip, clash with Kenyan police in Nairobi, Kenya on November 17, 2017. Kenyan police used tear gas and water cannons to disperse supporters.

NAIROBI, KENYA - NOVEMBER 17: A man is injured as supporters of political opposition leader Raila Odinga who are trying to gather near the country's main airport and Uhuru park to welcome Odinga back from an overseas trip, clash with Kenyan police in Nairobi, Kenya on November 17, 2017. Kenyan police used tear gas and water cannons to disperse supporters.