Some of Iran's demands over lifting economic sanctions against it have not yet been addressed in the nuclear talks in Vienna, Iran's foreign minister said on Monday in Tehran.

U.S. Special Envoy for Iran Rob Malley will travel to the United Arab Emirates, Israel, Saudi Arabia and Bahrain Nov. 11-20 to coordinate ahead of fresh talks about reviving the 2015 Iran nuclear deal, the U.S. State Department said on Thursday.

Iran responded to demands of Bahrain and Saudi Arabia to take part in any potential US negotiations with Iran saying that these states should know their size.

Japanese Prime Minister Shinzo Abe said on Monday that Tokyo is in discussions about a visit to Japan by Iranian President Hassan Rouhani this month, an attempt to try to resolve Iran's nuclear impasse with the United States.

President Hassan Rouhani said on Monday Iran would regain access to the international arms market later next year if it stuck to its 2015 nuclear deal with world powers and this would prove "a huge political success".

Iran has begun enriching uranium at its underground Fordow site in the latest breach of its deal with major powers, the U.N. nuclear watchdog confirmed on Monday, adding that Tehran’s enriched uranium stock has continued to grow.

U.N. nuclear inspectors are on the ground in Iran and will report back on relevant activities, an International Atomic Energy Agency spokesman said on Wednesday after Iran said it injected uranium gas into centrifuges at its Fordow site.

Iran will start injecting uranium gas into centrifuges at its underground Fordow enrichment facility, Iranian President Hassan Rouhani said on Tuesday, a highly symbolic breach that will complicate European efforts to salvage Tehran’s nuclear deal.

Iran said on Monday it had launched a new batch of advanced centrifuges to accelerate uranium enrichment, further reducing compliance with the 2015 nuclear deal following the withdrawal of its arch-foe the United States.

The United States said on Thursday it had imposed sanctions on the Iranian construction sector and trade in four materials used in its military or nuclear programs, even as it waived sanctions to let foreign firms continue non-proliferation work in Iran.

The United States on Friday asked foreign governments to submit detailed reports on humanitarian exports to Iran, a step observers said could have a chilling effect and cast a pall over European efforts to allow trade.

Saudi Arabia's crown prince warned in an interview broadcast on Sunday that oil prices could spike to "unimaginably high numbers" if the world doesn't come together to deter Iran, but said he preferred a political solution to a military one.

Iranian President Hassan Rouhani said on Tuesday he was open to discuss small changes, additions or amendments to a 2015 nuclear deal between Iran and six major powers if the United States lifted sanctions imposed on the Islamic republic.

U.S. Defense Secretary Mark Esper said on Friday that it appeared Iran was inching toward a place where talks could be held, days after U.S. President Donald Trump left the door open to a possible meeting with Iranian President Hassan Rouhani.

A senior US official personally offered several million dollars to the Indian captain of an Iranian oil tanker suspected of heading to Syria, the State Department confirmed Wednesday.

Iran on Wednesday said it would take another step away from a 2015 nuclear deal by starting to develop centrifuges to speed up its uranium enrichment but it also gave European powers two more months to try to save the multilateral pact.

U.S. President Donald Trump on Wednesday left the door open to a possible meeting with Iranian President Hassan Rouhani at the upcoming U.N. General Assembly in New York.

Iran's foreign minister said on Tuesday Tehran would further cut its commitments under a 2015 nuclear deal unless European states acted to salvage the pact by Thursday, but that this did not mean the "end of talks", Iranian news agencies reported.

France has proposed offering Iran about $15 billion in credit lines until year-end if Tehran comes fully back into compliance with its 2015 nuclear deal, a move that hinges on Washington not blocking it, Western and Iranian sources said.

Iran said on Monday it would further reduce its commitments under a 2015 nuclear deal if European parties failed to shield Tehran's economy from sanctions reimposed by the United States after Washington quit the accord last year.