Iran has agreed to readmit International Atomic Energy Agency (IAEA) inspectors to its territory, a development that signals a breakthrough in ongoing diplomatic efforts between Tehran and Washington.
Vance confirmed the agreement following the first round of negotiations aimed at ending the conflict in the Middle East.
The announcement was made during a press conference in Bern, Switzerland, where the talks are being hosted.
The move represents a significant shift in Iran's stance on nuclear oversight, which has been a central sticking point in regional security discussions for years.
By allowing IAEA monitors back into the country, Tehran is signaling a willingness to engage with international verification mechanisms.
This development is likely to be viewed positively by markets sensitive to geopolitical risk in the Middle East, as it reduces the immediate threat of military escalation.