Minister of Petroleum and Mineral Resources Ali bin Ibrahim Al-Naimi, left here today after having led his country\'s delegation to the 18th Arab Conference on Mineral Resources as well as the 14th session of Arab Ministers of Mineral Resources, that took place, in The Sudan. At Khartoum International airport, he was seen off by Ahmed Karamnu, Minister of State of the Ministry of Human Resources Development, and Saudi ambassador to Sudan Faisal bin Hamid Muaalla.