The Mecca Joint Defense Agreement , a trilateral defense pact between Turkey, Saudi Arabia and Pakistan, will send a delegation to Iran for talks on Oct. 25, with Saudi Defense Minister Khalid bin Salman, Pakistani military chief Asim Munir, and Turkish intelligence chief Ibrahim Kalin meeting with Iran's Mohsen Rezaei, head of the country's Supreme National Security Council. The meeting reportedly aims to "reinforce" regional security, as Iran's Houthi allies in Yemen remain locked in combat with the Saudis, regional escalation looms on the backdrop of U.S.-Israeli threats against Iran, and Mecca Pact partners deploy defensive forces to Saudi Arabia.