Obama envoy Scott Gration optimistic about Sudan referendum
Almost four million people have registered to take part in Sunday's referendum on whether Africa's biggest country - Sudan - should be divided.
This follows almost two decades of violence between the north and south.
President Obama's special envoy to Sudan has told the BBC that he believes Sunday's referendum for southern Sudan will take place successfully.
Scott Gration said he had reasons to be optimistic about the outcome of the vote and believed that parties would cooperate.