The opening round of talks between Iran and 6 world powers ended with a positive note and talks are likely to resume, but America says oil embargo is likely to continue.
Both sides agreed on a plan to further negotiations to produce a deal to set boundaries on Irans nuclear ambitions.
Iranian Foreign Minister Mohammad Javad Zarif, said Iran will not conclude its nuclear ambitions and vowed not to "close down any site".
The six powers, the United States, Russia, China, Britain, France and Germany, want Tehran to agree to substantial cuts in its nuclear programme project.