Sudan’s government and Darfur rebels agreed to formally end faltering talks on Tuesday and the African Union urged both sides to stop fighting so peace efforts could resume in January, mediators and delegates said. The break up of peace talks in the Nigerian capital came as British aid agency Save the Children announced it was pulling all 350 of its staff out of Darfur after the killing of four of its staff and renewed clashes in the western Sudanese region. Nigerian President and AU chairman Olusegun Obasanjo met rebels and government delegates to determine the future of the negotiations and to persuade both sides to halt their military offensives. Full Story