The 16th conference of heads of Arab immigration, passports and naturalization departments has concluded its works at the headquarters of the General Secretariat of the Council of Arab Interior Ministers here, with the participation of delegations of Ministries of Interior in Arab countries, Arab League and Naif Arab University for Security Sciences. Director General of Passports of Maj. Gen. Suleiman bin Abdulaziz Al-Yahiya of the Kingdom of Saudi Arabia headed his country's delegation to the conference. At its conclusion, the conference called on its member States to deal with illegal immigrants in line with the provisions of the conventions and protocols related.