South Sudan's President Salva Kiir gestures during a news conference in Juba
South Sudan's President Salva Kiir gestures during a news conference in Juba December 18, 2013. Kiir said on Wednesday he was ready for dialogue with his rival who he has accused of trying to force him out of power through fighting that has killed up to 500 people and brought the two-year-old nation close to civil war. REUTERS/Goran Tomasevic (SOUTH SUDAN - Tags: CIVIL UNREST POLITICS ELECTIONS)
South Sudan's President Salva Kiir speaks during a news conference in Juba
South Sudan's President Salva Kiir speaks during a news conference in Juba December 18, 2013. Kiir said on Wednesday he was ready for dialogue with his rival who he has accused of trying to force him out of power through fighting that has killed up to 500 people and brought the two-year-old nation close to civil war. REUTERS/Goran Tomasevic (SOUTH SUDAN - Tags: CIVIL UNREST POLITICS ELECTIONS)
South Sudan's President Salva Kiir wipes his face during a news conference in Juba
South Sudan's President Salva Kiir wipes his face during a news conference in Juba December 18, 2013. Kiir said on Wednesday he was ready for dialogue with his rival who he has accused of trying to force him out of power through fighting that has killed up to 500 people and brought the two-year-old nation close to civil war. REUTERS/Goran Tomasevic (SOUTH SUDAN - Tags: CIVIL UNREST POLITICS ELECTIONS)
South Sudan's President Salva Kiir wipes his face during a news conference in Juba
South Sudan's President Salva Kiir wipes his face during a news conference in Juba December 18, 2013. Kiir said on Wednesday he was ready for dialogue with his rival who he has accused of trying to force him out of power through fighting that has killed up to 500 people and brought the two-year-old nation close to civil war. REUTERS/Goran Tomasevic (SOUTH SUDAN - Tags: CIVIL UNREST POLITICS ELECTIONS)
South Sudan's 'president Salva Kiir listen media questions during a news conference in Juba
South Sudan's President Salva Kiir listens to a question from the media during a news conference in Juba December 18, 2013. Kiir said on Wednesday he was ready for dialogue with his rival who he has accused of trying to force him out of power through fighting that has killed up to 500 people and brought the two-year-old nation close to civil war. REUTERS/Goran Tomasevic (SOUTH SUDAN - Tags: CIVIL UNREST POLITICS ELECTIONS)
Locals and foreign nationals gather at Juba International Airport as they wait for flights out of the South Sudanese capital Juba
Locals and foreign nationals gather at Juba International Airport as they wait for flights out of the South Sudanese capital Juba December 18, 2013. Clashes that erupted in Juba late on Sunday spread on Wednesday to the flashpoint town of Bor, north of the capital and scene of an ethnic massacre in 1991 that has raised fears of slide back into conflict between clans. REUTERS/Hakim George (SOUTH SUDAN - Tags: CIVIL UNREST POLITICS)
Locals and foreign nationals gather at Juba International Airport as they wait for flights out of the South Sudanese capital Juba
Locals and foreign nationals gather at Juba International Airport as they wait for flights out of the South Sudanese capital Juba December 18, 2013. Clashes that erupted in Juba late on Sunday spread on Wednesday to the flashpoint town of Bor, north of the capital and scene of an ethnic massacre in 1991 that has raised fears of slide back into conflict between clans. REUTERS/Hakim George (SOUTH SUDAN - Tags: CIVIL UNREST POLITICS)
Locals and foreign nationals gather at Juba International Airport as they wait for flights out of the South Sudanese capital Juba
Locals and foreign nationals gather at Juba International Airport as they wait for flights out of the South Sudanese capital Juba December 18, 2013. Clashes that erupted in Juba late on Sunday spread on Wednesday to the flashpoint town of Bor, north of the capital and scene of an ethnic massacre in 1991 that has raised fears of slide back into conflict between clans. REUTERS/Hakim George (SOUTH SUDAN - Tags: CIVIL UNREST POLITICS)
Locals and foreign nationals gather at Juba International Airport as they wait for flights out of the South Sudanese capital Juba
Locals and foreign nationals gather at Juba International Airport as they wait for flights out of the South Sudanese capital Juba December 18, 2013. Clashes that erupted in Juba late on Sunday spread on Wednesday to the flashpoint town of Bor, north of the capital and scene of an ethnic massacre in 1991 that has raised fears of slide back into conflict between clans. REUTERS/Hakim George (SOUTH SUDAN - Tags: CIVIL UNREST POLITICS)
U.N. warns that South Sudan violence could spread
SOUTHSUDAN-UNREST/UN (URGENT):U.N. warns that South Sudan violence could spread