An analysis of satellite images published by an American research center on Wednesday revealed a significant acceleration in construction work inside a fortified Iranian site at a great depth on Mount Kulang near Natanz, amid Western intelligence services’ suspicion that Tehran is working to establish an undeclared uranium enrichment facility.
The photos, the most recent of which date back to August 9, 2026, showed the intensification of work related to fortifying the tunnel entrances and developing the internal road network at the site.
Experts at the Center for Strategic and International Studies, a Washington-based research institute, said they analyzed satellite images taken over a period of six years, indicating that recorded activity on roads on Mount Kulang during 2026 exceeded levels observed since the site was established.
Experts explained that the construction work included raising and fortifying the entrances to the tunnels, paving the internal road network, strengthening the areas surrounding the entrances, in addition to leveling and removing excavation waste.
On the other hand, the center confirmed that it was unable to prove or deny reports of an Israeli intelligence assessment that Iran had moved centrifuges to the site.
Last July, US President Donald Trump threatened to attack the site, but the threat was not carried out.
In a related context, the International Atomic Energy Agency asked Tehran to provide it with information about Mount Kulang and allow it to enter the site, while the Center for Strategic and International Studies indicated that Iran did not respond to these requests, according to reports.
Experts also pointed out that the facility is located inside a granite block and at a great depth, which makes targeting it difficult even using the heaviest American non-nuclear munitions.
These data come as the war between the United States and Iran enters its seventh month, coinciding with the continuation of attacks and strikes exchanged between the two parties.
