Internal Security Service
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|Jurisdiction||Sultanate of Oman|
|Parent agency||Royal Office|
Internal Security Service (ISS) (Arabic: جهاز الأمن الداخلي), is the national security intelligence agency of Oman. The agency focuses solely upon domestic security while foreign intelligence operations is handled by the Royal Office, which controls external security and coordinates all intelligence and security policies.
The stated overall purpose of ISS is to investigates all matters related to internal security.