State media report that Sudan has stopped all talks with South Sudan on oil payments and other disputes after new fighting broke out in the border area.
The reports say Sudan would immediately withdraw its negotiators from talks sponsored by the African Union in Ethiopia and also order a general army mobilisation.
Sudan earlier accused South Sudan of having attacked the disputed Heglig border area where Sudan controls a large oil field.
South Sudan said its army acted in self defence after being attacked by Sudanese forces.
