(CNN) -- A report released Thursday calls for more transparency over Sudan oil revenues to avoid conflict as the nation prepares for a vote that could see it split into two.
"With a referendum on independence for southern Sudan just days away, oil sector transparency is now more important than ever to preserving the fragile peace between north and south," Global Witness said in its report.
Southern Sudan is scheduled to start voting Sunday on whether to become an independent country or remain part of Sudan. At stake in the vote are Sudan's massive oil reserves, found mostly in the south, but still controlled by the government in the north.
U.S. Secretary of State, Hillary Clinton, has called the passage of the referendum "inevitable," but said the north may not warm up to the idea of losing oil revenues in the south. CNN