Alleged Undisclosed Iranian Nuclear Facility Revealed by Opposition Group

Newly released satellite images have brought to light what appears to be a previously undisclosed Iranian nuclear weapons facility, according to a report from the opposition group National Council of Resistance of Iran (NCRI), as per Fox News.

The group’s findings come at a critical juncture as the United States continues sensitive nuclear negotiations with Tehran.

The alleged site, located in Iran’s Semnan Province, is reportedly codenamed the “Rainbow Site” by Iranian officials and spans approximately 2,500 acres. It is said to have operated covertly for over a decade under the guise of a chemical production company known as Diba Energy Siba.

According to NCRI, the site’s primary purpose is the extraction of tritium—a radioactive isotope used to boost the yield of nuclear weapons. Unlike uranium enrichment, tritium has few if any civilian or commercial applications, casting further skepticism on Iran’s assertions that its nuclear program is solely for peaceful purposes.

The satellite imagery shows a large, sprawling compound isolated from Iran’s better-known nuclear facilities, such as those in Natanz and Fordow. The images suggest extensive infrastructure consistent with what analysts say could support weapons development.

The U.S. government has not officially commented on the new intelligence. However, when asked about the administration’s position on Iran’s enrichment capabilities, President Donald Trump told reporters on Wednesday, “We haven’t made that decision yet. We will, but we haven’t made that decision yet.”

Despite the report’s revelations, senior officials remain cautiously optimistic about ongoing talks. Vice President JD Vance addressed the media on Tuesday, saying, “Without prejudging the negotiation, I will say, so far so good. We’ve been very happy with how the Iranians have responded to some of the points that we’ve made.”

The new discovery adds further complexity to the already tense diplomatic environment surrounding Iran’s nuclear ambitions and may increase pressure on U.S. negotiators to demand greater transparency and inspections.

Iran has not responded publicly to the NCRI report or the satellite imagery.

The NCRI, a long-time critic of Iran’s regime, has a history of uncovering clandestine nuclear activity. In 2002, it played a key role in revealing the existence of the Natanz uranium enrichment facility, which ultimately led to increased international scrutiny.

If verified, the existence of the Rainbow Site could significantly alter the trajectory of current negotiations and prompt renewed calls for expanded oversight of Iran’s nuclear program.

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