The Kremlin, asked on Monday if Russia had held consultations with Iran before or after Tehran responded to a letter from U.S. President Donald Trump urging the country to negotiate a nuclear deal, said Iran formulates its own policy positions.

Iran's Supreme Leader Ayatollah Ali Khamenei has shut down Trump's offer for talks on a nuclear deal and said a "bullying government" was being persistent.

President Donald Trump sent a letter to Iran's Supreme Leader Ali Khamenei, seeking a new deal with Tehran to restrain its rapidly advancing nuclear program and replace the agreement he withdrew America from during his first term in office.