Iran has long maintained that its nuclear programme is for peaceful, civilian purposes only. It has several facilities around Iran, at least some of which have been targeted in the Israeli strikes.
But many countries – as well as the global nuclear watchdog, IAEA – are not convinced the programme is for civilian purposes alone.
This week, the watchdog's board of governors formally declared Iran in breach of its non-proliferation obligations for the first time in 20 years.
It cited Iran's "many failures" to provide full answers about undeclared nuclear material and Iran's stockpile of enriched uranium.
An earlier IAEA report said Iran had enriched uranium to 60% purity, near weapons grade, to potentially make nine nuclear bombs.