Since law enforcement and police duties are partly in the responsibility of the German states, Hamburg has its own police force. This forces consists of the state police " Polizei Hamburg", the State Criminal Police Office (German: "Landeskriminalamt"), the Criminal Investigation Services ("Kriminalpolizei"), the Water Police ("Wasserschutzpolizei") controlling traffic in the port of Hamburg, the Reserve Police ("Bereitschaftspolizei"), the Special Weapons and Tactics Unit ("Spezialeinsatzkommando") and Mobile Surveillance Units ("Mobiles Einsatzkommando").