Post-election violence escalates in Kenya

Police march past a burning barricade in the Mathare slum as they try to stop clashes between two rival groups Photograph: Tony Karumba/AFP

A man carries a sack of cement he looted during the disturbances Photograph: Tony Karumba/AFP

Residents of the Kibera slum salvage the gate of a house that was set on fire Photograph: Boniface Mwangi/EPA

A policeman walks past burning buildings during riots in the Mathare slum Photograph: Karel Prinsloo/AP

A boy throws sewage water on burning buildings as a protestor attempts to destroy a building in the background Photograph: Karel Prinsloo/AP

A man raises his arms in triumph as a mob attacked people and set houses and businesses on fire in the the slum of Mathare Photograph: Boniface Mwangi/EPA

An opposition supporter who was beaten by a mob using clubs, machetes and crude weapons on a road outside the Mathare slum Photograph: Boniface Mwangi/EPA

A policeman escorts residents away from a mob Photograph: Boniface Mwangi/EPA

A mob which ran riot in the slum of Mathare Photograph: Boniface Mwangi/EPA

A policeman holds a teargas canister to his mouth as he walks in front of protestors Photograph: Karel Prinsloo/AP

An area of the Kibera slum which was razed to the ground after days of rioting Photograph: Riccardo Gangale/AP