Internal Security Service (ISS) , is the national security

National security

National security is the requirement to maintain the survival of the state through the use of economic, diplomacy, power projection and political power. The concept developed mostly in the United States of America after World War II...

 intelligence agency

Intelligence agency

An intelligence agency is a governmental agency that is devoted to information gathering for purposes of national security and defence. Means of information gathering may include espionage, communication interception, cryptanalysis, cooperation with other institutions, and evaluation of public...

 of Oman

Oman

Oman , officially called the Sultanate of Oman , is an Arab state in southwest Asia on the southeast coast of the Arabian Peninsula. It is bordered by the United Arab Emirates to the northwest, Saudi Arabia to the west, and Yemen to the southwest. The coast is formed by the Arabian Sea on the...

. 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.