In the oil rich Abyei region of Sudan, more fierce fighting has killed 22 government soldiers.
It is not known how many rebels died.
The fighting, which flared despite a recent ceasefire, threatens a fragile peace accord supposed to end decades of civil war.
Al Jazeera's Dan Nolan has the latest.
Sudan's governemnt has accused Darfur's largest refugee camp of harbouring rebel fighters. The Kalma camp is the only one that is permanently protected by United Nations and African Union forces, but residents fear they may be driven out as the military threatens to take action. Al Jazeera's Hoda Abdel-Hamid reports from the camp.