Fox News has acquired satellite imagery that an opposition group claims reveals what is alleged to be a previously unknown Iranian nuclear weapons facility. This discovery raises new concerns amidst the ongoing negotiations between Tehran and the Trump administration.

This newly uncovered site, situated in Iran’s Semnan Province, is distant from the regime’s known nuclear facilities. The National Council of Resistance of Iran (NCRI) indicates that information collected from inside the country reveals a vast compound spanning nearly 2,500 acres.

The site, code-named the “Rainbow Site” by Iranian officials, is said to have been operational for over a decade, camouflaged as a chemical production company called Diba Energy Siba.

Satellite images reveal the location and layout of an alleged Iranian secret nuclear weapons facility that has been unknown until now. (National Council of Resistance of Iran)

“Without prejudging the negotiation, I will say, so far, so good,” Vance told reporters. “We’ve been very happy with how the Iranians have responded to some of the points that we’ve made.”

The discovery of the Rainbow Site could complicate the already delicate diplomacy surrounding Iran’s nuclear capabilities and the possibility of a renewed agreement.