The head of Iran's nuclear program says the European Union has failed to honor its commitments under Tehran's nuclear deal with world powers, following the U.S. withdrawal from the 2015 accord over a year ago.
The Sunday remarks by Ali Akbar Salehi came after a meeting with the visiting acting chief of the U.N. atomic watchdog Cornel Feruta in Tehran.
Salehi said the EU ``was supposed to fill the vacuum'' in enforcing the deal, but ``unfortunately they could not.''
The visit by Feruta came a day after Iran announced it would begin using advanced centrifuges prohibited by the deal.
Iran is trying to pressure Europe to deliver on its promise of economic relief, despite U.S. sanctions.
Feruta will also meet with Mohammad Javad Zarif, Iran's foreign minister.