A group of nearly 100 prominent Iranian dissidents is demanding that Congress launch investigations into clandestine efforts by the Islamic Republic to influence U.S. policy using a network of lobbyists and propaganda pieces placed in Voice of America’s Persian service, according to a letter sent to leading lawmakers and obtained by the Washington Free Beacon.

The group of dissidents, composed of prominent Iranian voices that oppose the hardline regime in Tehran, says that Congress is not doing enough to expose the Iranian regime’s lobbying efforts in D.C. and propaganda network, which is said to include some at VOA Persia.

Iranian-American groups claiming to represent American interests are said to be carrying water for the Islamic regime inside the White House and on Capitol Hill, according to these dissident voices.

The letter cites VOA’s Persian service as a source of pro-Iran corruption. The Free Beacon has reportedmultiple times on claims that VOA has been infiltrated by Iran regime loyalists who seek to spin coverage in a favorable way for Tehran. In one instance, an Iranian dissident was barred from appearing on VOA Persia for voicing critical opinions about the regime.