Riyadh, Rajab 5, 1437, Apr 12, 2016, SPA -- Vice Custodian of the Two Holy Mosques Prince Mohammed bin Naif bin Abdulaziz patronized here today the graduation ceremony of as many as 4483 cadets of upgrading courses, at the Public Security Headquarters. The cadets represent a number of cities, from the regions of Riyadh, the Eastern, Assir and Qassim. Upon arrival, the Vice Custodian of the Two Holy Mosques was received by many official of the Public Security. A speech ceremony was held on this occasion. --More 19:59 LOCAL TIME 16:59 GMT www.spa.gov.sa/w