Prince Naif bin Abdulaziz, the Interior Minister, today lauded the firmness of relations binding the two sisterly countries: the Kingdom of Saudi Arabia and the Republic of Yemen under the instructions of the leaderships of the two countries. In a statement to the Saudi Press Agency following a meeting between Prince Naif and President Salih of Yemen, Prince Naif confirmed that security cooperation between the two countries is progressing from better to best. Security Coordination between the two countries is considered one, he told SPA.