Internal Security Department
Jabatan Keselamatan Dalam Negeri
Agency overview
Formed1 August 1993; 30 years ago (1993-08-01)
Preceding agency
JurisdictionGovernment of Brunei
HeadquartersJalan Utama Mentiri, Kampong Sungai Tilong, Mukim Berakas 'B', Brunei BC3315
Parent agencyPrime Minister's Office
WebsiteOfficial website

The Internal Security Department (Malay: Jabatan Keselamatan Dalam Negeri, or JKDN or KDN) 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 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 1 August 1993.[4]

In 2011, Tobishima Corporation was the contractor responsible for completing the Latifudin Complex Tungku Link in Rimba.[5]


The ISD is in charge of cases that involve subversion, espionage, sabotage, terrorism and promotion of racial/religious violence.[6] However, the ISD collaborates with the Royal Brunei Police Force to maintain internal security.[7]


The ISD has its headquarters at Jalan Utama Mentiri with branch offices in Tutong, Belait and Temburong.[8]


  1. ^ "Security and Enforcement". Archived from the original on 11 June 2012. Retrieved 21 January 2013.
  2. ^ Canada (2 March 2008). "Brunei - New Internationalist". Retrieved 17 February 2015.
  3. ^ "Brunei: Internal Security Act (ISA) Arrests In Brunei". 30 June 2004. Retrieved 17 February 2015.
  4. ^ "Internal Security Department". Archived from the original on 16 January 2010. Retrieved 11 January 2022.
  5. ^ "Internal Security Department (2011)|Brunei Darussalam|Oversea Projects|TOBISHIMA Website". January 2011.
  6. ^ "Internal Security Department - Roles and Responsibility".
  7. ^ "National Security". 4 August 2023.
  8. ^ "Internal Security Department - Introduction".