Riyadh, Safar 23, 1437, December 05, 2015, SPA -- On behalf of Prince Ahmed bin Abdulaziz Al Saud, Prince Faisal bin Bandar bin Abdulaziz, Governor of Riyadh Region, here on Saturday evening patronized the International Volunteer Day's ceremony organized by the Saudi Charity Association for Alzheimer Disease. The event was attended by a number of princes and officials. --SPA 23:36 LOCAL TIME 20:36 GMT www.spa.gov.sa/w