An airplane drops bombs on a market in Unity state , a South Sudanese spokesman says . The government has been fighting rebels since December and is trying to retake the oil-rich state. A dispute continues regarding Heglig , a key oil installation that South Sudan recently took over . The African Union similarly has called on forces to pull out and for aerial bombardments to stop . South Sudan is at odds with Sudan on border issues , months after becoming independent .
An airplane drops bombs on a market in Unity state , a South Sudanese spokesman says . The government has been fighting rebels since December and is trying to retake the oil-rich state. 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 .