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US launches heavy airstrikes on Isfahan targeting Iran defense and nuclear sites

US forces struck Isfahan with bunker-buster bombs in an attack that targeted defense and enrichment sites, prompted Iranian counterclaims including a drone shootdown, and escalated tensions as diplomats seek a ceasefire.

Mar 31st 2026 · Iran

Insights

  • United States carried out airstrikes on Isfahan on 31 March 2026 using 900 kilogram bunker-buster bombs.
  • NASA satellite imagery detected smoke columns over sites near Mount Soffeh, a location with military bases.
  • Iran acknowledged strikes on military installations and confirmed the death of IRGC general Jamshid Eshaghi and his family.
  • Tehran reported shooting down a US drone near Isfahan after the attack.
  • Isfahan hosts major defense industry facilities and at least one uranium enrichment site that US officials say could contain enriched material.
  • The White House has weighed a possible ground incursion to seize nuclear material, according to Axios reporting.
  • Attacks also struck research and populated areas in Tehran, causing at least a dozen deaths and more than 100 injuries, and UNESCO reports widespread damage to heritage sites.
  • Diplomatic contacts through mediators are stalled while a Pakistan-China proposal urges an immediate ceasefire and protection of civilians.

Sources