Nuclear talks between the US and Iran are facing fresh uncertainty after a meeting set to take place this weekend was postponed and US officials said they had never agreed to join the latest round in the first place.

Planned negotiations between Iran and the United States this weekend over Tehran’s rapidly advancing nuclear program have been postponed, Oman announced Thursday. A message online from Omani Foreign Minister Badr al-Busaidi made the announcement in a post on the social platform X.

President Donald Trump on Thursday threatened sanctions on anyone who buys Iranian oil, a warning that came after planned talks over Tehran’s rapidly advancing nuclear program were postponed. Trump wrote on social media,