The BBC reports Sudan has declared South Sudan an enemy state.
Sudanese MPs have voted unanimously to brand South Sudan "an enemy".UPI has a similar report. Scheduled peace talks as part of the border demarcation requirements and the 2005 agreement that led to South Sudan's independence have been cancelled.
"The government of South Sudan is an enemy and all Sudanese state agencies have to treat her accordingly," the resolution said.
A Khartoum information ministry official told the BBC the move was linked to South Sudan's seizure last week of the Heglig oil field.
The South had accused Sudan of launching attacks on its territory from the frontier oil field.
The only question at this point is whether either nation has the means to actually prosecute a war, and over how wide a front.