The United States on Thursday slapped new sanctions on five Iranian entities for what it called "brazen attempts" to interfere with the US election.
Stepping up pressure after US intelligence pointed the finger at both Iran and Russia, the Treasury Department accused the Iranian groups of seeking to spread disinformation and division ahead of the November 3 vote.
The Treasury imposed the fresh sanctions against the Islamic Revolutionary Guard Corps (IRGC), the IRGC-Qods Force, the Bayan Rasaneh Gostar Institute, the Iranian Islamic Radio and Television Union and International Union of Virtual Media.
The announcement came one day after the US Director of National Intelligence John Ratcliffe fingered Iran as behind recent emails addressed to US voters threatening them to support President Donald Trump and his Republican Party.
Iran summoned the ambassador of Switzerland, who represents US interests in Tehran in the absence of diplomatic relations, to deny the "fabricated and clumsy" allegations.