The Chairman of Libya's General National Congress Dr. Mohamed Yousef Al-Magariaf received today an invitation from the Custodian of the Two Holy Mosques King Abdullah bin Abdulaziz Al Saud to attend the 3rd Arab Development, Economic and Social Summit to be held in Riyadh. The invitation was delivered by Saudi Ambassador to Libya Mohammed bin Mahmoud Al-Ali during a meeting with Dr. Al-Magariaf today.