The UN says up to 50,000 people have been forced to leave their homes in the South Sudanese state of Jonglei.
They are fleeing violence between the rival Lou Nuer and Murle tribes.
Nearly four thousand troops and police are being sent into the area to try control the situation.
Haru Mutasa has had exclusive access to the town of Pibor and sent this report.
Source: Al Jazeera