Internal Security Department

Internal Security Department

Seal of the ISD
Agency overview
Formed	17 February 1966
Preceding agency	Special Branch, as part of the Malayan Security Service (1948)
Jurisdiction	Government of Singapore
Headquarters	New Phoenix Park, 28 Irrawaddy Road, Singapore
Minister responsible	Teo Chee Hean, Minister for Home Affairs
Agency executive	Classified
Parent agency	Ministry of Home Affairs
Website	Official Site

Coordinates: 1°19′24.58″N 103°50′38.72″E / 1.3234944°N 103.8440889°E / 1.3234944; 103.8440889

The Internal Security Department (ISD; Chinese: ; pinyin: nèi bù ān quán jú; Malay: Jabatan Keselamatan Dalam Negeri; Tamil: உள்நாட்டுப் பாதுகாப்புத் துறை) is a domestic intelligence agency of the Ministry of Home Affairs of Singapore. It was formerly part of the Ministry of Interior and Defence until it was split on 11 August 1970. It has the utmost right to detain without trial individuals suspected to be a threat to national security.

The stated mission is to confront and address security threats, including international terrorism, foreign subversion and espionage. The ISD also monitors and addresses potential threats from communism, prevention of racial tension which might affect the public peace, domestic counterterrorism, international counterterrorism, fraud against the state, surveillance, apprehension of suspected militants or terrorists and protection of Singapore's national borders.