Finland's national police service exhibits its Roman influence in its insignia and administration. The Finnish service is under the authority of the Minister of the Interior. All Finnish police officers are Federal employees, responsible for the maintenance of law and order, prevention of criminality, investigation of crimes, initiation of legal proceedings against offenders, and performance of other traditional police duties. Police departments are generally divided into several divisions: the Public Order and Safety Police, Criminal Police, Mobile Police, and Central Criminal Police responsible for dealing with organized crimes and crimes that are more difficult to solve. The Security Police act on crimes against the State and against acts that endanger public order and safety. Finland has only one academy for basic, advanced, specialty, and correspondence training; sergeant's training takes five months.