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Security concerns at South Sudan border

6 July 2011 Last updated at 05:59 BST

South Sudan will split away to become a new country on Saturday, and there are concerns over the security of oil-rich areas near the border with the north.

The Sudanese government says it is trying to defeat a rebellion in South Kordofan which is made up of thousands of fighters, closely allied to the Southern rebels in the long north-south civil war.

At least 70,000 civilians have been displaced. Despite international calls for a ceasefire in the state, President Omar Bashir has vowed to fight on.

Will Ross reports from Juba.