New satellite images strengthen allegations that Iran is reinforcing an underground facility in its nuclear site amid ongoing tensions as the US and Iran continue talks on a nuclear programme deal agreement.

The images showed bolstered tunnel entryways at Mount Kolang Gaz La, or Pickaxe Mountain. They were analysed by The Institute for Science and International Security (ISIS), and according to experts, this underground facility may be intended to shield Iran's uranium enrichment operations. Its exact function is still unknown, perBBC.

Iran argued it was not attempting to develop nuclear weapons, butUS President Donald Trump said in 2025 that Iran was close to building a nuclear weaponand launched attacks on three underground nuclear facilities.

Trump said the attacks had completely destroyed Iran's nuclear enrichment capacity, but said Iranian officials were looking to build a new site.

The National Council of Resistance of Iran (NCRI) Washington office Deputy Director Alireza Jafarzadeh said the satellite images are also an indication that Iran is advancing its efforts to rebuild its uranium enrichment capacity, which is worth $2 trillion (£1.5 trillion).

According to a statement given by Jafarzadeh toFox News Digital, 'The regime has clearly stepped up efforts to rebuild its uranium enrichment capabilities. It is preparing itself for a possible war by trying to preserve its nuclear weapons program and ensure its protection.'

Jafarzadeh added, 'That said, the ongoing rebuilding of Iran's uranium enrichment capabilities is particularly alarming as the regime is now engaged in nuclear talks with the United States.'​

🇮🇷🛰️ Satellite Images Reveal Iran Fortifying Sensitive Military and Nuclear Sites After 2024 StrikesNewly released satellite imagery indicates that Iran has constructed a reinforced concrete shield over a new facility at a sensitive military site, later covering it with soil,…pic.twitter.com/JSXf2XTMND

The satellite images show the reconstruction happening at the Isfahan complex, one of Iran's three uranium enrichment plants attacked during 'Midnight Hammer,' a US military operation. Other facilities attacked were Fordow and Natanz.​

Jafarzadeh also noted that, as similar rebuilding activities seem to also be happening at the Natanz facility, 'These efforts in Isfahan involve rebuilding its centrifuge program and other activities related to uranium enrichment.'

Source: International Business Times UK