U.S. talks that were supposed to take place on Wednesday will be shifted to Saturday, Tehran's foreign ministry spokesperson said, with a third round of high-level nuclear talks due on the same day in Oman.

Negotiations between Iran and the United States over Tehran’s rapidly advancing nuclear program will move to what’s known as the “expert level” — a sign analysts say shows that the talks are moving forward rapidly.

In 2018, during his first term in office, President Donald Trump pulled out of an existing 2015 nuclear deal with Iran calling it 'one-sided'