Iran launched dozens of ballistic missiles toward Israel on Friday night in retaliation for Israel's surprise attack early Friday. Israel struck at the heart of the Iran's nuclear program, killing several nuclear scientists as well as high-ranking military leaders, according to Israeli officials.

Israel has issued an "urgent warning to Iranian citizens" to evacuate areas close to military sites after fresh exchanges of strikes between the two countries overnight raised fears of further escalation.

The strikes came after the Israeli military said it had carried out fresh strikes on Iran nuclear infrastructure sites.

Smoke and flames filled the sky over Tehran as Israel struck oil and gas facilities in the Iranian capital and targeted more nuclear facilities during attacks that carried on into Sunday after starting two days earlier.

Iran and Israel continued trading missiles and airstrikes on June 14, a day after Israel launched a sweeping air offensive against its old enemy.

Cypriot President Nikos Christodoulides said he would speak with Israeli Prime Minister Benjamin Netanyahu on Sunday to convey a message from Iran, as the clash between the countries enters its third day.

Iran and Israel exchanged missile strikes on Saturday as the conflict sparked by Israel’s attack on its regional rival’s nuclear programme entered a second day.

The Lebanese militant group Hezbollah was long considered Iran’s first line of defense in case of a war with Israel.

Israel's military said the air force had concluded a wave of overnight strikes targeting air defenses in the area of Tehran. "We damaged—and will continue to damage—strategic sites and enemy sources of knowledge,

Maj. Gen. Yadlin, who flew in the 1981 Osirak reactor strike, explains why Israel's current operation against Iran represents a complex, multi-week campaign.