The British Royal Institute for United Services announced that it will host at its headquarters in London on January 16-17 an international conference on confronting and combating terrorism entitled ''Terrorism Across International Borders'' sponsored by the Kingdom of Saudi Arabia. In its statement, the Institute said that the main speakers include Prince Saud Al-Faisal, Saudi Foreign Minister; Prince Mohammed bin Nawaf bin Abdulaziz, Saudi Ambassador to the United Kingdom and Ireland and British Foreign Secretary Jack Straw.