German Foreign Minister Heiko Maas said on Friday that he was concerned about Tehran postponing the resumption of the Vienna negotiations on the Iranian nuclear program

The United States remains ready to return to Vienna and continue negotiations on the Joint Comprehensive Plan of Action (JCPOA) with Iran, US Secretary of State Antony Blinken said on Thursda

Tehran has to make the next decisions on the Joint Comprehensive Plan of Action (JCPOA) as the "ball remains in Iran's court," US Secretary of State Antony Blinken said on Thursday

The United States repeatedly fails to keep its promise to remove sanctions on Iran and instead demands to add new articles to the nuclear deal, Iranian Supreme Leader Ali Khamenei said on Wednesday