A protester chants slogans during the #OccupyHarambeeAve protest in Kenya's capital Nairobi November 25, 2014. Kenyan police used teargas to disperse demonstrators shouting “President, Stop the killings!” outside President Uhuru Kenyatta's offices on Tuesday, in the protest over 28 people killed in a weekend attack claimed by Islamist militants. (Photo by Thomas Mukoya/Reuters)

Protesters hold up wooden crosses, symbolising people killed in a series of attacks, during the #OccupyHarambeeAve protest in Kenya's capital Nairobi November 25, 2014. (Photo by Thomas Mukoya/Reuters)

Protesters chant slogans as they carry wooden crosses, symbolising people killed in a series of attacks, during the #OccupyHarambeeAve protest in Kenya's capital Nairobi November 25, 2014. (Photo by Thomas Mukoya/Reuters)

A protester lies on top of wooden crosses, symbolising people killed in a series of attacks, during the #OccupyHarambeeAve protest in Kenya's capital Nairobi November 25, 2014. (Photo by Thomas Mukoya/Reuters)

Protesters carry coffins during the #OccupyHarambeeAve protest in Kenya's capital Nairobi November 25, 2014. (Photo by Thomas Mukoya/Reuters)

Protesters celebrate as they set ablaze wooden crosses, symbolising people killed in a series of attacks, during the #OccupyHarambeeAve demonstration in Kenya's capital Nairobi November 25, 2014. (Photo by Thomas Mukoya/Reuters)

Wooden crosses, symbolising people killed in a series of attacks, are set ablaze by protesters during the #OccupyHarambeeAve demonstration in Kenya's capital Nairobi November 25, 2014. (Photo by Thomas Mukoya/Reuters)

Protesters burn wooden crosses, symbolising people killed in a series of attacks, and coffins during the #OccupyHarambeeAve demonstration in Kenya's capital Nairobi November 25, 2014. (Photo by Thomas Mukoya/Reuters)

Protesters lay wooden crosses on the ground, symbolising people killed in a series of attacks, during the #OccupyHarambeeAve demonstration in Kenya's capital Nairobi November 25, 2014. (Photo by Thomas Mukoya/Reuters)

A riot police officer fires a teargas canister to disperse the #OccupyHarambeeAve demonstration in Kenya's capital Nairobi November 25, 2014. (Photo by Thomas Mukoya/Reuters)

Protesters flee the scene, leaving behind coffins and wooden crosses symbolising people killed in a series of attacks, during the #OccupyHarambeeAve demonstration in Kenya's capital Nairobi November 25, 2014. (Photo by Thomas Mukoya/Reuters)

Riot police officers remove a coffin left behind by protestors during the #OccupyHarambeeAve demonstration in Kenya's capital Nairobi November 25, 2014. (Photo by Thomas Mukoya/Reuters)

A detained protester jumps from a police truck as she escapes after riot police released teargas to disperse the #OccupyHarambeeAve demonstration in Kenya's capital Nairobi November 25, 2014. (Photo by Thomas Mukoya/Reuters)

A detained protester escapes from a police truck after riot police released teargas to disperse the #OccupyHarambeeAve demonstration in Kenya's capital Nairobi November 25, 2014. (Photo by Thomas Mukoya/Reuters)

A police driver negotiates with protesters blocking traffic during the #OccupyHarambeeAve demonstration in Kenya's capital Nairobi November 25, 2014. (Photo by Thomas Mukoya/Reuters)

A riot police officer looks out peers from a truck before firing teargas to disperse the #OccupyHarambeeAve demonstration in Kenya's capital Nairobi November 25, 2014. (Photo by Thomas Mukoya/Reuters)

A wooden cross, symbolising people killed in a series of attacks, is placed by protesters on a police truck with teargas canisters behind the windscreen during the #OccupyHarambeeAve demonstration in Kenya's capital Nairobi November 25, 2014. (Photo by Thomas Mukoya/Reuters)