The UN Security Council has called on the Khartoum government to withdraw its forces immediately from the Abyei region, a key area of dispute in the north-south division of Sudan next month. There has been no agreement on which country the oil-producing region should belong to when south Sudan becomes independent on July 9, but the northern military seized it on 21 May 21, sparking fears of a renewed civil war. 'The council demands that the government of Sudan withdraw immediately from the Abyei area,' said a unanimous formal council statement.