Tunisian President Moncef Marzouki received a message from the Custodian of the Two Holy Mosques King Abdullah bin Abdulaziz Al Saud, inviting the President to attend the Arab Development, Economic and Social Summit to be held in Riyadh. The message was delivered by Saudi Ambassador to Tunisia Khalid bin Musaed Al-Angari during a meeting with the Tunisian President today. The Tunisian President expressed appreciation of the Custodian of the Two Holy Mosques for the leading role played by the Kingdom of Saudi Arabia to serve Arab and Islamic causes, stressing his country's keenness on strengthening bilateral relations.