Sirens sounded in Israel as Iran launched dozens of ballistic missiles in retaliation for Israel's strikes on its nuclear facilities.

Missiles have been fired at Israel after Iran's leader vowed to deliver "heavy blows" in response to strikes on its military and nuclear sites. Watch how Iran's retaliatory attack unfolded and follow the latest updates below.

Israel’s historic strike on Iran revealed years of Mossad activity inside the country, including hidden weapons, drones and assassinations of nuclear officials.

"Iran must make a deal, before there is nothing left, and save what was once known as the Iranian Empire," President Donald Trump said.

Iran and Israel targeted each other with airstrikes early on Saturday after Israel launched its biggest-ever offensive against its longtime foe in a bid to prevent it from developing a nuclear weapon.

Israel obliterated top Iranian nuclear scientists with incredible precision, according to stunning new photos showing single apartments blown out of Tehran high-rises. Aftermath pictures of the

Israel sent Mossad commandos deep into Iran to destroy Iranian weapons systems during Israel's attack on nuclear and military targets, an Israeli security source said, while another official said Israel used a ploy to suggest the strike was not imminent.

President Trump joked that Iranian officials killed in Israel's airstrike clearly did not die of an illness, warning that Iran should have heeded his warning.