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Iran's Mysterious Closure of Nuclear Tunnels Under Mount Fars

PUBLISHED May 7, 2026
Iran's Mysterious Closure of Nuclear Tunnels Under Mount Fars

Iran's Nuclear Facility Under Mount Fars: Recent Developments

Recent satellite imagery has revealed that Iran has partially closed the entrances to two tunnels at its nuclear facility located beneath Mount Fars, south of the Natanz enrichment site. These images, captured on April 22, show that the eastern tunnel openings have been partially filled with earth, which now obstructs vehicle access to the area. Previously, these entrances were completely open and free of any obstructions in images taken earlier in the same month. While the fill does not entirely block the entrances, it significantly hampers the rapid movement of vehicles in and out, suggesting that heavy machinery would be required to clear the debris to reopen the routes. Notably, no similar changes were observed at the western tunnel entrances of the complex.

Questions Arise Surrounding the Secluded Site

This development raises significant questions regarding the nature of activities occurring at this deeply buried site, which is believed to serve as a protective measure for sensitive equipment or materials. Earlier this year, the area had already witnessed increased activity, including the filling of old tunnel openings and reinforcing them with concrete—a process that suggests the possibility of equipment or materials being relocated into the facility. The new images further complicate the narrative of what Iran might be attempting to conceal or safeguard within the installation under Mount Fars, especially considering the limited information Tehran has provided over the years about the nature of its projects.

Experts speculate that the site could be utilized for storing equipment and materials related to Iran's nuclear program or for protecting sensitive activities from potential airstrikes. It may also serve as a relocation point for operations from more vulnerable facilities to a heavily fortified area, allowing for continued work even if other sites come under attack, as reported by Israeli Channel 12.

Since the attacks on Iranian nuclear facilities last year, there has been a heightened interest among researchers and international experts in this site, which has not faced any targeting from Israel or the United States, unlike facilities such as Fordow, Natanz, and Isfahan. Constructed in recent years, information about this facility remains extremely limited, and it has never been visited by inspectors from the International Atomic Energy Agency. Reports published in recent years suggest that this complex may represent a new underground enrichment facility located at a considerable depth, potentially deeper than the Fordow site, which has previously been subjected to both American and Israeli strikes.

As reported by dailybeirut.com.

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