Tehran/Washington/Muscat, June 10 -- The sixth round of indirect nuclear talks between Tehran and Washington are scheduled to take place in Oman on Sunday, said Iran's Foreign Ministry Tuesday.
Iran and the United States have held five rounds of talks so far, three of which were held in Muscat and two in Rome since the beginning of Tehran's talks with the US on coming to a possible deal on its nuclear programme and the lifting of sanctions.
The fifth round was held on May 23 in Rome. In late May, the United States presented a proposal to Tehran through Oman for a potential nuclear deal with Iran.
While both sides have acknowledged some progress, a decisive breakthrough has yet to be achieved, due to disagreements on uranium e...