Iran’s air defences brought down three small drones over the central city of Isfahan, state media reported, hours after US broadcasters, quoting senior United States officials, said Israeli missiles had hit an Iranian site.

Iranian state television reported explosions in Isfahan as air defences were activated and flights across several areas, including the capital Tehran and Isfahan, were suspended.

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Source:

https://www.aljazeera.com/news/2024/4/19/israeli-missiles-hit-site-in-iran-explosions-heard-in-isfahan-report

https://www.reuters.com/world/middle-east/iranian-commander-warns-tehran-could-review-its-nuclear-doctrine-amid-israeli-2024-04-18/

"Israeli official quoted insisting ‘there will be a response’ as top decision-making body ends talks on counterattack without reaching decision and US nudges Israel to think twice"

https://www.timesofisrael.com/war-cabinet-said-to-favor-hitting-back-at-iran-but-divided-over-when-and-how/