Internal Security Department
Agency overview
FormedAugust 1, 1993
Preceding agency
JurisdictionGovernment of Brunei
HeadquartersJalan Utama Mentiri, Kampong Sungai Tilong
Parent agencyBrunei Prime Minister's Office

The Internal Security Department is Brunei's domestic intelligence agency, which is under the Prime Minister's Office.[1] They are known to detain anyone suspected of being a threat to Brunei's national security threat for as long as needed.[2]

They are involved in both criminal and intelligence matters.[3]


The ISD was created to replace the Royal Brunei Police's Special Branch division, which was disbanded on August 1, 1993.[4]


  1. ^ "Security and Enforcement". Archived from the original on June 11, 2012. Retrieved January 21, 2013.
  2. ^ Canada (2 March 2008). "Brunei - New Internationalist". Retrieved 2015-02-17.
  3. ^ "Brunei: Internal Security Act (ISA) Arrests In Brunei". 2004-06-30. Retrieved 2015-02-17.
  4. ^ "Internal Security Department". Archived from the original on 16 January 2010. Retrieved 11 January 2022.