Egypt, Libya leaders in Sudan as vote fears rise
Analysts say rows could reignite conflict, threaten region
South Sudan army, renegade force clash kills 14
Clash raises tensions ahead of January independence vote
INTERVIEW-U.N. fears mass migration if Sudan vote sparks war
Hundreds of thousands may flee to neighbouring countries if fighting breaks out after referendum on secession, says U.N.
Obama writes to regional leaders over Sudan-W.House
Obama wants to make sure the vote takes place on time and the outcome is respected
Obama lobbies regional leaders as Sudan vote looms
Obama wants to make sure the vote takes place on time and the outcome is respected
Fighting in Sudan's Darfur forces 12,000 to flee
Sudan's army and Darfur rebels and are heading towards already overcrowded camps and settlements in the strife-torn territory, peacekeepers say