Tunisian President Mohammed Moncef Al-Marzouqi, left here today, following taking part in the workings of the 3rd Arab Economic and Social Development summit. At Riyadh Airbase, he was seen off by Saudi Ambassador to Tunisia Khalid bin Mosaed Al-Anqari, Tunisian Charge D'Affaires in the Kingdom Khamis Al-Mistairi and a Representative of the Royal Protocol. -- SPA