Fighting has continued in South Sudan despite regional efforts to broker a ceasefire. In the oil-producing Unity state, government troops and their opponents are fighting for control of the regional capital, Bentiu.
Hundreds of thousands of people have been displaced as a result. Most of them live in overcrowded UN camps across the country.
There are plans to bring in reinforcements from UN peacekeeping missions in Liberia, Ivory Coast and the DR Congo.
Al Jazeera's Mohammed Adow reports from Juba.