HE the Prime Minister and Minister of Interior Sheikh Khalid bin Khalifa bin Abdulaziz al-Thani met with Undersecretary of the Ministry of Interior in Saudi Arabia Dr Hisham bin Abdulrahman al-Falih on the sidelines of the graduation ceremony of the fifth batch of candidate students of the Ministry of Interior's Police Academy at the Police Training Institute in Al Sailiya. Aspects of co-operation between the two brotherly countries and means of developing them, especially in the security and military fields, were reviewed during the meeting.