Expert-level nuclear talks to discuss the details of a possible comprehensive agreement on Iran's nuclear issue will start in the Austrian capital Vienna on Wednesday, Press TV reported on Monday.

The talks, which follow a senior-level meeting in February, will last for three days until Friday, said Hamid Baeidinejad, the director general for political and international affairs at Iran's Foreign Ministry, who also heads Iran's expert-level nuclear negotiating team.

The delegation from the P5+1 group -- Britain, China, France, Russia, the United States plus Germany -- would be led by Stephen Clement, an aide to EU High Representative for Foreign Affairs and Security Policy Catherine Ashton, Baeidinejad said.

Iran and the world powers inked an interim deal in Geneva in November, 2013. Under the deal Iran agreed to freeze part of its nuclear activities in exchange for a relief in the West's sanctions on its economy.

On Feb. 20, after three days of intensive negotiations, the two sides announced a timetable for their talks toward a comprehensive deal and agreed for expert-level meetings to get into the issues in more details and define a framework for the negotiations.