The Parallel Intelligence Agency (Nahadhayih ittia’ti-yih muvazi) is an intelligence agency within the Islamic Republic of Iran made up of personnel from multiple security organizations aggregated into ad hoc security bodies, with strong ties to Islamic Revolutionary Guards Corps (IRGC) and the judiciary.
These ad hoc entities are described as plainclothes police who operated at the behest of political conservatives opposed to the reformist ideas of President Khatami.
References
Parallel Intelligence Agency Wikipedia(Text) CC BY-SA