An airplane drops bombs on a market in Unity state , a South Sudanese spokesman said . A government spokesman says its military did n't carry out any attacks in South Sudan . A dispute continues over Heglig , a key oil installation that South Sudan recently took over . South Sudan is at odds with Uganda on economic issues , months after becoming independent .
An airplane drops bombs on a market in Unity state , a South Sudanese spokesman says . A Sudanese spokesman says its military did n't carry out any attacks in South Sudan . A dispute continues regarding Heglig , a key oil installation that South Sudan recently took over . South Sudan is at odds with Sudan on border issues , months after becoming independent .