The Amir His Highness Sheikh Tamim bin Hamad Al Thani, alongside heads of state and delegations, took part in the Joint Arab-Islamic Extraordinary Summit at the King Abdul Aziz International Conference Center in Riyadh, Saudi Arabia, on Monday. The summit was attended by members of the official delegation accompanying HH the Amir. Earlier, on arrival at King Khalid International Airport, HH the Amir was welcomed by Deputy Governor of Riyadh Region HRH Prince Mohammed bin Abdulrahman bin Abdulaziz Al Saud, Ambassador of Qatar to Saudi Arabia HE Bandar bin Mohammed Al Attiyah, and Ambassador of Saudi Arabia to Qatar HH Prince Mansour bin Khalid bin Farhan Al Saud. (QNA)