Acting U.S. Ambassador to the United Nations Jonathan Cohen told the U.N. Security Council on Monday that Washington's policy on Iran "remains an economic and diplomatic effort to bring Iran back to the negotiating table."

Iran said on Sunday it would not back down from its decision to scale back some of its commitments under 2015 nuclear deal with major powers, state TV quoted Iran's Deputy Foreign Minister Abbas Araqchi as saying.

An adviser to Iranian President Hassan Rouhani said on Friday if U.S. President Donald Trump does not want war with Tehran, he should ease sanctions, as tensions rise between the countries following the downing of a U.S. drone by Iran.

Iran's supreme leader told Japanese prime minister Shinzo Abe on Thursday that it was pointless to reply to a message he had brought to Tehran from U.S. President Donald Trump, as a peacemaking visit was overshadowed by attacks on tankers in the Gulf of Oman.

US Secretary of State Mike Pompeo said Sunday his country was ready to talk with Tehran "with no preconditions", but with no indication lifting sanctions over Iran's nuclear programme is on the table.

Iran will not negotiate with the United States, Supreme Leader Ayatollah Ali Khamenei said on Wednesday, after President Hassan Rouhani signaled talks with Washington might be possible if sanctions were lifted.

Iran will reduce some "voluntary" commitments within its nuclear deal with world powers as a response to members' inability to resist U.S. pressure, but will not withdraw from it, state media on Wednesday quoted Foreign Minister Mohammad Javad Zarif as saying.

Secretary of State Mike Pompeo said on Monday the United States is not extending any waivers exempting importers of Iranian oil from U.S. sanctions and there will be no grace period for those economies to comply.

Iran announced the "successful test" of a new cruise missile with a range of over 1,350 kilometres on Saturday, coinciding with celebrations for the country's 1979 Islamic revolution.

Iranian President Hassan Rouhani made an apparent threat on Tuesday to disrupt other countries’ oil shipments through the Gulf if Washington presses ahead with efforts to halt Iranian oil exports.

Qatar Airways will add more flights to Iran from January, the state-owned Gulf airline announced on Monday just weeks after the United States re-imposed sanctions aimed at crippling Tehran's economy.

Iran sees no point in fresh nuclear talks with the US without guarantees it will not renege on any deal made, Foreign Minister Mohammad Javad Zarif said on Thursday.

Iranian President Hassan Rouhani said on Saturday that U.S. sanctions announced last week have had no effect on Iran’s economy because Washington had already practically reimposed them earlier.

The Belgium-based SWIFT financial messaging service will be disconnecting some Iranian banks this weekend, said SWIFT chief executive Gottfried Leibbrandt at an event in Paris on Friday.

Turkey has been granted a waiver of around 25 percent on U.S. oil sanctions against Iran, Turkish Energy Minister Fatih Donmez said on Friday, amounting to around three million tonnes of oil annually.

Iran said on Tuesday it had so far been able to sell as much oil as it needs despite U.S. pressure, but it urged European countries opposed to U.S. sanctions to do more to shield Iran, as Russia and Turkey also voiced their objections.

The Belgium-based SWIFT financial messaging service said on Monday it is suspending some unspecified Iranian banks’ access to its messaging system in the interest of the stability and integrity of the global financial system.

The European Union, France, Germany and Britain said in a joint statement on Friday that they regret Washington's decision to reimpose sanctions on Iran.

Iran said on Friday it had no concerns over the reimposition of new U.S. sanctions on the country’s vital oil and financial sectors, expected to be announced by Washington on Nov. 4.

France's foreign ministry said on Thursday a so-called Special Purpose Vehicle (SPV) that the European Union is considering creating to enable trade with Iran could be used more broadly to help the bloc avoid the extraterritorial reach of U.S. law.