Negotiations seeking a definitive accord on Iran’s nuclear program will resume on May 12 in Vienna, the European Union and Tehran said Tuesday.

Negotiations seeking a definitive accord on Iran's nuclear program will resume on May 12 in Vienna, the European Union and Tehran said Tuesday.

EU negotiator Helga Schmid and her Iranian counterparts Abbas Araghchi and Majid Takht Ravanchi "will resume their work on 12 May in Vienna," the EU diplomatic service said in a statement.

The political leaders of the other world powers involved in the negotiations will join the talks on May 15, the statement said.

Iran's Deputy Foreign Minister Abbas Araghchi, speaking on state television in Tehran, confirmed the plans.

"We will resume negotiations next Tuesday up to Friday when the G5+1 (global powers) will join us and we will arrive at some conclusions," said Araghchi, who is part of an Iranian team currently taking part in expert-level talks in New York, on the  margins of a UN disarmament summit.

Iran and the P5+1 group of countries – the United States, France, Britain, Russia, China, and Germany - reached a mutual understanding on Tehran’s nuclear program in the Swiss city of Lausanne on April 2.

Tehran and the six-party group have agreed to finalize a comprehensive deal by the end of June.

US top diplomat John Kerry met his Iranian counterpart Mohammad Javad Zarif in New York on Monday hoping to push forward the tough nuclear negotiations as they reach the final phase.

Lower-level negotiations resumed last week in Vienna after the April 2 breakthrough in Lausanne, but little has trickled out about the discussions.