Dubai: Iran has begun construction on a site at its underground nuclear facility at Fordo amid tensions with the U.S. over its atomic program, satellite photos obtained on Friday by The Associated Press show.
Iran has not publicly acknowledged any new construction at Fordo, whose discovery by the West in 2009 came in an earlier round of brinkmanship before world powers struck the 2015 nuclear deal with Tehran.
Already, Iran is building at its Natanz nuclear facility after a mysterious explosion in July there that Tehran described as a sabotage attack.
“Any changes at this site will be carefully watched as a sign of where Iran’s nuclear program is headed,” said Jeffrey Lewis, an expert at the James Martin Center for Nonproliferation Studies at the Middlebury Institute of International Studies who studies Iran.
Iran’s mission to the United Nations did not immediately respond to a request for comment. The International Atomic Energy Agency, whose inspectors are in Iran as part of the nuclear deal, also did not immediately respond to a request for comment. The IAEA as of yet has not publicly disclosed if Iran informed it of any construction at Fordo.
Read:|Satellite image shows construction at Iran nuclear site
Construction on the Fordo site began in late September. Satellite images obtained from Maxar Technologies by the AP show the construction taking place at a northwest corner of the site, near the holy Shiite city of Qom some 90 kilometres (55 miles) southwest of Tehran.
A Dec. 11 satellite photo shows what appears to be a dug foundation for a building with dozens of pillars. Such pillars can be used in construction to support buildings in earthquake zones.
The construction site sits northwest of Fordo’s underground facility, built deep inside a mountain to protect it from potential airstrikes. The site is near other support and research-and-development buildings at Fordo.
Among those buildings is Iran’s National Vacuum Technology Center. Vacuum technology is a crucial component of Iran’s uranium-gas centrifuges, which enrich uranium.
A Twitter account called Observer IL earlier this week published an image of Fordo showing the construction, citing it as coming from South Korea’s Korea Aerospace Research Institute.
The AP later reached the Twitter user, who identified himself as a retired Israeli Defense Forces soldier with a civil engineering background. He asked that his name not be published over previous threats he received online. The Korea Aerospace Research Institute acknowledged taking the satellite photo.