Tribal raids killed 900 S.Sudanese in Dec-Feb -UN
South Sudan, which split away from Sudan a year ago, has been struggling to stamp its authority on its territory
Sudanese refugees dying as water runs out - MSF
Medical agency warns refugee crisis near border between two Sudans is now "full blown emergency"
Refugees accuse Sudan of scorched-earth offensive
Sudanese army and civilian officials in turn accuse the rebels of using civilians as human shields and as pawns to win international sympathy
Sudan army clashes with rebels in border oil state
Hundreds of thousands of people have fled their homes in South Kordofan and nearby Blue Nile state since the fighting broke out-UN
Sudanese in Lebanon protest for refugee status
Protesters staging a hunger strike in Lebanon call on the United Nations to grant refugee status to thousands of Sudanese migrants so they could be resettled in other countries