Internal Security Force (ISF) – Hamas
The Internal Security Force (ISF) is the intelligence organisation of the Hamas government, operating under the Ministry of Interior. It is made up of members of the al-Majd internal security force within the Izz al-Din al-Qassam Brigades (IQB), and is responsible for espionage and informants. It has been a force against dissent and political opposition.
The force is made up of two bodies: the Internal Security Agency, led by Sami Oudeh; and the newly established General Intelligence, led by Sami Nofal. The overall leader of the ISF is Major General Nasir Maslah.