Although Iran maintains that its nuclear program is for peaceful energy purposes, Israel has long seen it as a threat. Israeli strikes have hit three of Iran’s nuclear facilities — Natanz, Isfahan and Fordow. Little damage appears visible in satellite imagery of Fordow.

Trump calls for Iran's 'unconditional surrender', tells Tehran to evacuate as air war rages on. Israel plans to destroy Fordow nuclear site.

Early Monday morning, the Israeli military warned residents in several areas of an imminent Iranian attack and urged them to remain near shelters and safe rooms. Iran struck a residential block in Petach Tikva, in central Israel, killing at least four people, officials said.