Intensifying diplomacy to end the conflict, Pakistan's military chief arrived in Tehran on Friday to press on with mediation efforts, and Iranian media reported that Iran's foreign minister and Pakistan's interior minister had met there.
Qatar also sent a negotiating team to the Iranian capital to try to resolve the sides' main differences, six weeks into a fragile ceasefire.
While some gaps have been narrowed, there are still sticking points over Iran's enriched uranium and control over the Strait of Hormuz, whose closure since the start of the war has triggered a global energy crisis.
“There's been some progress,” Rubio told reporters after a meeting of NATO ministers in Sweden. He reiterated that Iran's plans for a tolling system for the strait were "unacceptable".
Iran's semi-official Tasnim news agency said negotiations were continuing, adding that progress had been made on some issues, but no agreement would be reached until all disputed matters are resolved.
