Kamal Kharrazi, an adviser to Iran's supreme leader, said on Thursday Tehran has not closed all doors to resolve its disputes with the United States and is ready for indirect negotiations with Washington.

Iran has set a condition for negotiations with the United States regarding the nuclear deal. Negotiations will be impossible unless Washington changes its policy of pressure, reports Reuters, citing Iranian Foreign Minister Abbas Araghchi.

Talks with the U.S. are impossible unless Washington changes its pressure policy, the Iranian foreign minister said on Sunday, as Iran prepares to respond to President Donald Trump's letter proposing negotiations on a new nuclear deal.