A natural-gas refinery in southern Iran suffered an explosion Saturday after what authorities said was an Israeli drone attack, according to the Iranian defense ministry news agency Defa Press. Israel has launched dozens of strikes at Iran's nuclear and military facilities since Friday.

Four of the people died when a missile hit a residential block in the central Israeli city of Petah Tikva, and three more in Haifa, the local authorities said. An 80-year-old man died when his home collapsed as a result of a shock wave from a strike in Bnei Brak, a city east of Tel Aviv.

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Iran launched multiple deadly waves of missiles and drones toward Israel into Saturday morning following Israel’s unprecedented strikes aimed at destroying Iran’s nuclear program and decapitating its military leadership.

Israeli energy company Bazan said its Haifa oil refinery suffered pipeline and transmission line damage during Iran’s overnight missile barrage. Refining core facilities continue to operate at the site,

Israel’s sweeping attack across Iran struck at the heart of Tehran’s nuclear program, delivering a blow to the country’s ability to enrich uranium and potentially setting its nuclear ambitions back by months or years.

Israel and Iran's long-simmering tensions erupted into missile attacks on Friday, when Israel struck military and nuclear targets in Iran, and Iran retaliated with waves of ballistic missiles.

Iran has partially suspended gas production at the world's biggest gas field after an Israeli strike caused a fire there on Saturday, the semi-official Tasnim news agency reported, in what would be the first Israeli strike on Iran's oil and gas sector.