The United Nations World Food Programme (WFP) expressed deep concern on Wednesday about the deadly ethnic violence in South Sudan's Jonglei state, where thousands of people have had to flee their homes in recent days.
In a statement issued on Wednesday, WFP said the violence between the Lou Nuer and Murle groups "has pushed the food security situation to crisis levels" in Jonglei, the largest state in South Sudan.
Thousands of Murle civilians, including many women and children, have sought refuge in forests and swamps to avoid attack from rival ethnic groups, and they have little or no access to food and clean drinking water.
This follows an attack last weekend against the town of Pibor by a 6,000-strong column of armed youths from the Lou Nuer tribe.
Lise Grande, the UN Humanitarian Coordinator for South Sudan, said the exact number of casualties from the attack was unknown, but peacekeepers serving with the UN mission (UNMISS) had helped to rescue and evacuate civilians and deter further violence.