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.
Content on this website is for general information purposes only.
Your comments are provided by your own free will and you take sole responsibility for any direct or indirect
liability. You hereby provide us with an irrevocable, unlimited, and global license for no consideration to
use, reuse, delete or publish comments, in accordance with Community
Rules & Guidelines and Terms and