South Sudan conflict: Troops 'moving on Bentiu'
8 January 2014 Last updated at 19:55 GMT
Thousands of people are fleeing the South Sudanese city of Bentiu amid fears of a government offensive to recapture the oil-rich area from rebels.
The BBC's Alastair Leithead said that the reaction of both civilians and rebel soldiers in the city suggested that government troops were "moving on Bentiu".
Meanwhile, ceasefire talks between the two sides appear to be deadlocked over the government's imprisonment of 11 alleged coup plotters.