The Director General of Organization for Prohibition of Chemical Weapons Ambassador Rogelio Pfirter arrived in Riyadh on Monday on a three-day visit to the Kingdom. At King Khalid International Airport, he was received by Prince Dr. Turki bin Mohammed bin Saud Al-Kabeer, Assistant Undersecretary of Foreign Ministry for Political Affairs, Head of General Department for International Organizations and Chairman of National Commission for Implementation of Chemical Weapons Agreement.