Fox News has exclusively obtained satellite imagery revealing what an opposition group says is a previously undisclosed Iranian nuclear weapons facility – raising fresh concerns amid ongoing negotiations between Tehran and the Trump administration.

The newly identified site, located in Iran’s Semnan Province, is far from the regime's already-known nuclear facilities. According to the National Council of Resistance of Iran (NCRI), intelligence gathered from sources inside the country points to a sprawling compound covering nearly 2,500 acres.

Code-named the "Rainbow Site" by Iranian officials, the facility has reportedly been in operation for more than a decade, masked as a chemical production company known as Diba Energy Siba.

According to NCRI sources, the primary function of the Rainbow Site is the extraction of tritium – a radioactive isotope used to enhance nuclear weapons. Unlike uranium enrichment, tritium has virtually no peaceful or commercial applications, casting further doubt on Iran’s longstanding claims that its nuclear ambitions are solely for energy or civilian use.

The revelations come as the Trump administration navigates sensitive negotiations with Tehran. When asked about the U.S. position on whether Iran can maintain a nuclear enrichment program short of weapons development, President Donald Trump told reporters Wednesday, "We haven’t made that decision yet. We will, but we haven’t made that decision yet."

NCRI Reveals Iran’s Secret ‘Rainbow’ Facility Linked to Nuclear Weapons and Missile Program

A new exposé by the National Council of Resistance of Iran (NCRI) unveils an alarming secret project by Iran’s Organization of Defensive Innovation and Research (SPND) to enhance nuclear weapons capability. Since 2009, SPND has covertly pursued the development of boosted nuclear warheads designed for long-range ballistic missiles exceeding 3,000 km. Central to this effort is the clandestine “Rangin Kaman” (Rainbow) site near Ivanaki, Garmsar, covering 2,500 acres and masquerading as a chemical facility under Diba Energy Sina Company.

Key to the project is the extraction and use of tritium, enabling higher-yield nuclear weapons and the potential development of hydrogen bombs. SPND has secretly recruited nuclear fusion experts from the Atomic Energy Organization of Iran to advance this effort. The parent company overseeing front firms tied to the project is chaired by IRGC Brigadier General Naser Maleki, already sanctioned by the UN for nuclear and missile activities.

The Ivanaki site is heavily fortified with IRGC radar and air defense systems, signaling its strategic importance. This revelation raises serious concerns about Tehran’s nuclear intentions and ongoing deception under civilian and commercial covers.