The Police of Nepal is responsible for maintaining law and order and prevention of crime according to the constitution of Nepal and is under the authority of the Ministry of Home Affairs.There are four departments in the Police Headquarters that function to undertake the policing activities of Nepal Police. These departments are headed either by Additional Inspector General of Police (AIGP) or Deputy Inspector General of Police (DIGP). In addition to the departments, there are the National Police Academy and the Metropolitan Police Office that are being looked by Additional Inspector General of Police.