Children flee South Sudan city of Bentiu in trucks
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South Sudan: Thousands flee key city of Bentiu

9 January 2014 Last updated at 13:45 GMT

The bitter conflict between rebels and government forces in South Sudan is worsening.

Government troops are advancing on rebel-held positions in the country's northern oil fields.

The BBC's Alastair Leithead reports from a UN compound in the key city of Bentiu where people are fleeing with the little they can carry.