The Norwegian Safety Investigation Authority (NSIA; Norwegian: Statens havarikommisjon, SHK) is the government agency responsible for investigating transport-related accidents within Norway. Specifically, it investigates aviation accidents and incidents, rail accidents, maritime accidents, select traffic accidents, and serious incidents in the defence sector. All investigations aim to find underlying causes and to improve safety; criminal investigation is not part of AIBN's mandate. Subordinate to the Ministry of Transport, the agency is located on the premises of Kjeller Airport in Skedsmo.