Fierce new fighting along Sudan's volatile north-south divide is raising deep concern for the safety of the Nuba people, the forgotten victims of the country's long-running civil war who are once again under attack by government forces and militias.

The fighting has significantly increased the chances that the Comprehensive Peace Agreement (CPA) that ended the civil war six years ago will collapse, reigniting a north-south war and ending all hopes of peaceful partition when oil-rich South Sudan formally declares itself independent on 9 July.

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