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Sudan's president has said that unless ongoing border fighting with South Sudan is resolved, there will be no negotiations on oil or trade.

Tension has been high since South Sudan gained independence from Sudan in July 2011.

South Sudan inherited the majority of the region's oil fields in the split, and Sudan's oil revenue has fallen this year by $2.2bn. 

Al Jazeera's Mohamed Vall reports from Khartoum.

Source: Al Jazeera