John Kerry visits South Sudan amid genocide fears
2 May 2014 Last updated at 06:03 BST
US Secretary of State John Kerry is visiting South Sudan and has warned that more peacekeepers must be rapidly deployed to end the conflict.
South Sudan had been hit by "ethnic, tribal, targeted nationalistic killings", he said.
Rebel forces deny UN charges that they killed hundreds of people along ethnic lines after seizing the oil hub of Bentiu last month.
Emmanuel Igunza reports.