South Sudan has accused Sudan of bombing one of its oil facilities, despite recent moves to defuse the conflict between the two countries.
A number of blasts have been heard in South Sudan, with a military official saying that the Unity oil field was targeted.
The government in Khartoum has so far made no public comments on the claim.
On Friday, South Sudan said it was withdrawing its troops from the disputed Heglig oil field.
Sudan claimed it had regained the area by force.