Sudan has hit out at a call by UN Secretary General Kofi Annan for EU or NATO intervention in the war-torn Darfur region, saying the world body ought to back the existing African Union observer mission. "We believe that the African Union has the full mandate and capabilities to accomplish its mission satisfactorily and we expect that no other agency would tamper with this mission," junior foreign minister Naguib al-Khair Abd al-Wahab told AFP on Sunday. "We commend the work done by the African Union which has been recognised by the UN as the major body responsible for supervising the peace efforts in Darfur, and we expect the UN secretary general to spare no effort to bolster the AU in carrying out its assigned mission," Abd al-Wahab said.