Iran and world powers are to resume talks in the Austrian capital next week on drafting a final accord on the country’s nuclear programme, a senior Iranian negotiator said Friday.

Iran and world powers are to resume talks in the Austrian capital next week on drafting a final accord on the country's nuclear programme, a senior Iranian negotiator said Friday.

"The discussions are to resume on Tuesday in Vienna," said Abbas Araghchi, quoted by Mehr news agency from Vienna at the end of three days of talks at which he led the Iranian team.

The United States as well as Britain, China, France, Russia and Germany are in the midst of negotiations with Tehran to finalize a deal by June 30.

For several weeks, political and technical experts have been trying to finalize the terms of a final agreement. The latest was the fourth round of talks since an interim deal was agreed on April 2.