Iran has handed over documents related to outstanding issues to the International Atomic Energy Agency (IAEA), Iran's nuclear chief Mohammad Eslami told a televised news conference on Wednesday.
Iran and the UN nuclear watchdog last month agreed a three-month plan that in the best case will resolve the long-stalled issue of uranium particles found at old but undeclared sites in the country, removing an obstacle to reviving the Iran nuclear deal.
"We have handed over the documents on March 20 to the agency. They are reviewing those documents and probably the agency's representatives will travel to Iran for further talks and then the IAEA will present its conclusion," Eslami said.
The agency has long said Iran had not given satisfactory answers on those issues, but in early March they announced a plan for a series of exchanges.
IAEA chief Rafael Grossi said last month he will aim to report his conclusion by the June 2022 (IAEA) Board of Governors' meeting, which begins on June 6.
The joint plan will help to secure the nuclear deal, which Washington exited in 2018 and reimposed crippling sanctions on Iran.