(JNS) Iran and the International Atomic Energy Agency have resumed dialogue over traces of nuclear activity discovered at undeclared Iranian sites, IAEA Director Rafael Grossi announced.

Talks between the IAEA and Iran had reached an impasse after Tehran insisted that the nuclear watchdog close its files about the evidence of activity at three undeclared sites, which came to light following a 2018 Mossad raid on Iran’s nuclear archives in Tehran.

The issue has become an obstacle to the negotiations between Iran and world powers, led by the United States, aimed at reviving the 2015 nuclear deal.

According to international media reports, Grossi met with senior Iranian nuclear official Mohammad Eslami in Vienna on Monday, September 26 to resume negotiations.