Sigurnosno Izvestajna Sluzba

The Sigurnosno Izvestajna Sluzba (Security Information Service - SIS) is one of Croatia's leading intelligence agencies. It was initially politicized, supporting the ruling HDZ party and its control over the military. The SIS was restructured and de-politicized after the end of the war, diversifying its operations and departments to include the Croatian Navy and the Croatian Air Force, counterintelligence, criminal investigations and security for Croatia's military leaders. Although responsible solely for defense intelligence, the SIS is believed to conduct intelligence gathering operations in foreign countries of importance to Croatia.