Prince Naif bin Abdulaziz, the Interior Minister, received here on Wednesday evening Dr Nasser bin Abdullah Al-Saleh, the Director of Makkah-based Ummal Qura University, and Dr Osama Al-Bar, the Dean of the Institute of the Custodian of the two Holy Mosques for Hajj Research, an affiliate of Ummal Qura University. They reviewed issues pertaining to Hajj activities.