Dr. Abdullatif Al-Zayani, Secretary General of the Riyadh-based Gulf Cooperation Council, left here this evening, concluding a two-day official visit to Yemen as part of his efforts to follow-up the implementation of the GCC initiative and its executive mechanism to solve the Yemeni crisis. At Sanaa international airport, he was seen off by Dr. Abu-Bakr Abdullah Al-Girbi, Foreign Minister of Yemen, senior Yemeni officials and diplomats of the GCC embassies in Yemen.