UN Council demands end to Sudan, South Sudan clashes
U.N. Security Council says border clashes threaten to return the east African neighbors to a full-scale war
Sudan mobilizes army as South claims key oil field
After seceding in July, South Sudan has been locked in an increasingly bitter dispute with its former civil war foe over oil payments and other issues
Sudan accuses South of assaulting oil area
Sudanese rebels say Khartoum is carrying out air and ground attacks in South Kordofan