, KaPo for short) is a central national security institution of Republic of Estonia. Its purposes are centered on enforcing constitutional order. The Estonian Internal Security Service has primary investigative jurisdiction in some offences committed by state officials; countering terrorism; incitement to hatred; crimes against humanity and peace, including war crimes; illegal handling and trafficking of firearms, ammunition, explosives, radioactive material or other strategic materials; and the protection of state secrets. It also fills counterintelligence duties. - Source: Wikipedia