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Talks on Sudan's Abyei reach no agreement

Sudan president warns of greater conflict with south

SCENARIOS-Sudan prepares referendum on southern secession

Sudan secession will be dangerous precedent-Gaddafi

Sudan independence supporters clash with police, crowds

S. Sudan president asks for peacekeepers on border

S.Sudan president asks for buffer zone, peacekeepers

Uganda LRA rebels extend reach with new attacks

U.S., Britain concerned about Darfur

South Sudan rushes to train police ahead of vote