South Sudan says it has repelled attacks by Sudan along its disputed north-south border only one day before the two countries are to resume negotiations over oil wealth sharing and defining their shared border.

South Sudan military spokesman Col. Philip Aguer said Monday the attacks were the culmination of three days of bombardment in South Sudan's Western Bahr-el-Ghazal, Northern Bahr-el-Ghazal and Unity states.

Aguer said Antonovs, MiG fighter jets, ground artillery and helicopter gunships were used in attacks on Werguet and Majak Woi on Monday.

The two countries will resume bitter negotiations on issues left over from the 2005 peace deal that saw South Sudan break away from Sudan to form an independent nation.