In Sudan, "around 80,000 people have fled since the north Sudanese army seized the disputed Abyei region almost a week ago," a local official tells Reuters.
"The situation is going from worse to even worse," Dominic Deng, commissioner of the of a region in south Sudan that borders Abyei told the wire service. Many of the refugees have fled to his region, Deng said, and "they are sleeping under the trees. They need food and water ... some people are dying."
Thursday on Morning Edition, the U.S. special envoy to Sudan, Princeton Lyman, explained to guest host Mary Louise Kelly that Abyei "is a very small part of the Sudan, but it is one in which each side is very heavily invested, emotionally and politically. It has long been in dispute, between the north and the south, as to where Abyei should be."
According to Lyman:
"The Ngok Dinka, who feel that Abyei is their traditional homeland, feel very strongly, that Abyei should become part of the south. And within the government of the south, the Ngok Dinka are very important politically and this is a very important issue to them.
"On the other side, the Misseriya, who are a nomadic group, are a very important constituency to [Sudanese] President [Omar al-] Bashir. They fought on his side in the civil war against the south and he has promised them that they would continue, not only to have grazing rights in Abyei, but that they would have political rights in Abyei, and that it would stay in the north. So it has become an important area because of important constituencies on each side, that care deeply about this region."
For more on the situation in Sudan and the vote that led to the south splitting away from the north, see this February report by NPR's Frank Langfitt.