The European Union's foreign policy chief has received Iran’s response regarding a possible revival of the 2015 nuclear deal and sent it along to other members of the original accord, a spokesman said.
"Right now, everybody is studying this response," Josep Borrell's spokesman, Peter Stano, said on September 2.
"The way ahead will be -- as always -- discussed with all participants and the U.S.," he added.
Britain, China, France, Germany, Russia, and the United States signed the accord with Tehran in 2015.
Under the agreement, Iran curtailed its enrichment of uranium in exchange for the lifting of economic sanctions.
The EU has served as an intermediary for the indirect talks after then-President Donald Trump unilaterally withdrew the United States from the nuclear accord in 2018.
After the U.S. pullout, Tehran began to violate terms of the accord by rebuilding stockpiles of enriched uranium and installing advanced centrifuges to speed up output.
Talks on reviving the deal appeared to progress earlier this year, but indirect negotiations between Tehran and Washington broke down over several issues.
Earlier on September 2, Iranian Foreign Ministry spokesman Nasser Kanaani said that “the sent text [by Iran] has a constructive approach with the aim of finalizing the negotiations.”
He gave no details about the content of the text.
The State Department confirmed it had received Iran's response through the EU.
"We are studying it and will respond through the EU, but unfortunately it is not constructive,” the State Department said, also not elaborating on what Iran's proposal contained.
Iran insists it has no intention of developing nuclear weapons. Foreign Minister Hossein Amir-Abdollahian said earlier this week that Tehran needs stronger guarantees from Washington for the revival of the deal. He also said the IAEA should drop its "politically motivated probes" of Tehran's nuclear work.