Sudanese rebels said Tuesday they killed 150 government soldiers along the disputed border with South Sudan in a battle that prompted Khartoum to threaten retaliation against its newly independent neighbour.
Sudan's military denied the casualty toll and said it had killed a "huge number" of rebels, but gave no figure.
The casualties came during Sunday's "surprise attack" against a government base in the Jau area, said Arnu Ngutulu Lodi, of the Sudan People's Liberation Movement-North (SPLM-N).
Rebels counted the bodies on the ground, he said, and seized three tanks along with hundreds of weapons and vehicles in the joint operation with a small number of fighters from Darfur's Justice and Equality Movement (JEM).
The insurgents, who last year formed a "revolutionary front" aimed at toppling the Khartoum regime, claimed the attack in the contested Jau area -- part of an oil-rich region on the poorly defined border -- as their first combined operation against government forces.