trouble in Sudan ...

"At least 23 people have died in clashes between tribespeople and Arab nomads near Sudan's north-south border, leaders in a contested region said on Monday, on the second day of a week-long referendum on southern independence.
Analysts cite the central region of Abyei as the most likely place for north-south tensions to erupt into violence during and after the vote, the climax of a troubled peace deal that ended decades of civil war.
U.S. President Barack Obama Saturday warned both northern and southern leaders not to use proxy forces over the voting period, highlighting international concerns that both sides might be resorting to tactics used in past campaigns.
Southerners are expected to vote to split from the mostly Muslim north, depriving Khartoum of most of its oil reserves...."