Safety Investigation Authority
The Safety Investigation Authority of Finland is the accident investigation authority of Finland. It investigates all major accidents, and all aviation, maritime, and rail accidents and incidents. SIAF is located within the Ministry of Justice, and is headquartered in Helsinki, Finland.
The SIAF was previously known in English as the Accident Investigation Board of Finland.
Organization
The SIAF consists of five investigation branches: aviation, maritime, rail, other accidents, and exceptional events. The SIA has appointed a chief investigator to each.| Investigation branch | Description | Chief investigator |
| Aviation | The investigation of incidents and accidents regarding aviation in Finland. | Ismo Aaltonen |
| Maritime | The investigation of accidents and dangerous situations that take place on Finnish territorial waters or in which a Finland-based vessel is involved. | Risto Haimila |
| Rail | The investigation of especially hazardous accidents that happen either in rail, metro, or tram traffic, such as level crossing accidents, rolling stock fires, and train collisions. | Esko Värttiö |
| Other accidents | The Other accidents-branch investigates serious accidents that pose a risk to life or that cause significant economic or environmental harm. | Kai Valonen |
| Exceptional events | Exceptional events are events of a non-accidental nature, in which a severe risk to life and society is posed. The SIAF has investigated four of such events during its history: the Jokela school shooting, Kauhajoki school shooting, , and Turku stabbing. | Kai Valonen |
in 2004