In the last few years there have been calls to reestablish the independent National Police Commission to oversee transfers and promotions, thereby making the service autonomous and free from any influence. The police service is organised into five primary geographic commands, known as ranges (Range I, II, III, IV, V), covering the northern, western, eastern and southern sectors of the island under the command of a Senior Deputy Inspector General of Police (SDIG). The ranges were subdivided into divisions, districts, and police stations; Colombo was designated as a special range. Each police division headed by a Deputy Inspector General of Police (DIG) covers a single province, and a police district headed by a Senior Superintendent of Police (SSP) covers a single district of the country. In 1974 there were a total of 260 police stations throughout the country. As of 2007 there were more than 2,000. With the escalation of the Sri Lankan Civil War the strength and the number of stations have increased. Since 1971 the police service has suffered large number of casualties, with officers and constables killed and wounded as a result of terrorists and insurgents. In more remote rural areas beyond the immediate range of existing police stations, enforcement of simple crimes are carried out by the "Grama Seva Niladhari" (village service officers), but this has now become rare, with most villages covered by new police stations. In addition to its regular forces, the police service operated a reserve contingent until 2007 when the Reserve Police Force was disbanded and its personnel transferred to the regular police force. The police service has a number of specialised units responsible for investigative, protective, counter-terrorism and paramilitary functions. Investigation of organised criminal activity and detective work are handled by the Criminal Investigation Department (CID) under the command of a Deputy Inspector General of Police (DIG). More coordinated threats to internal security, such as that posed by the radical Sinhalese JVP in the 1980s, were the responsibility of the Counter Subversive Division, which was primarily an investigative division, and which has since been replaced by the Terrorist Investigation Department (TID). The TID carries out counter-terrorism investigations and threats to internal security from the LTTE. Protective security units which are entrusted the security includes the Ministerial Security Division (elected public figures), Diplomatic Security Division (foreign diplomats) and "Judicial Security Division" (judges). The President's Security Division and the Prime Minister's Security Division function independently but consist of mostly police personnel. Other specialised units includes the Information Technology Division, the Mounted Division, the Anti-riot Squad, Traffic Police, K9 units, the Marine Division, the Police Narcotic Bureau, and the Children & Women Bureau.