Official spokeswoman of the UN mission in Sudan Radia Ashouri said on Wednesday that the international organization did not take part in work of a special Sudanese panel investigating death of Vice President George Garang who died in a plane crash early this month. Speaking at a news conference, Ashouri said the Sudanese government asked the UN to present technical and logistical aid, adding that the UN mission in Sudan "believes that the International Aviation Organization is qualified to offer such help." She elaborated saying a joint military commission comprising staff of the UN mission in the country, the government and the SPLA, the southern Sudan Peoples Liberation Army (SPLA) agreed on forming sub committees to oversee the cease-fire between the government and the SPLA, in force since last January. The committee, during meetings held in the southern city of Juba, asked the two sides to supply it with accurate information on downgrading the armed forces, and called for participation of observers from the two sides in the truce observation mission, currently undertaken by UN observers. The UN spokeswoman said an operation for clearing mines on a main road across Juba had begun. On conditions in the Western region of Darfur, she indicated at recurring attacks on UN vehicles.