The United Nations has called for an investigation into the reported killings of at least 168 people in clashes in the Darfur region of Sudan.
The UN special representative Volker Perthes condemned the violence in Krink region of west Darfur, during which homes have been set on fire, hospitals attacked and goods looted.
Several non-governmental organisations said an individual dispute sparked the fighting between Arab nomads and members of the Massalit minority in Krink.
The International Committee of the Red Cross has warned of a rapidly deteriorating humanitarian situation and called for the injured and sick to be allowed to seek help.