The Federal Police (Spanish: Policía Federal, PF), formerly known as the Policía Federal Preventiva (Federal Preventive Police), is a Mexican police force under the authority of the Secretariat of the Interior. They are sometimes referred to by the slang term "Federales". Typically, agents of the Federal Police are heavily armed and wear dark blue, black, or gray combat fatigues. There is an investigation division within the Federal Police. Investigation of federal crimes can also be handled by the Ministerial Federal Police directed by the Attorney General of Mexico.