Yemeni President Abdu Rabbo Mansur Haddi, 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 Yemen Ali bin Mohammed Al-Hamdan, Yemeni Charge D'Affaires in the Kingdom Ahmed Abdu Jarradi and a Representative of Royal Protocol. -- SPA