Secretary General of the Organization of Islamic Conference (OIC) Ekmel-Eddin Ihsanoglu left here today after a two-day visit to Egypt during which he participated in the International Donors Conference for the development and reconstruction of Darfur. Speaking on the occasion, Ihsanoglu said the unity of Sudan constitutes a guarantee for the stability of Africa, adding that any danger that may threaten this unity will be entailed by undesirable repercussions at the Arab and Islamic arenas.