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.

Iran launches missiles at central and north Israel as the Israeli military carries out further strikes in Iran.

Prime Minister Benjamin Netanyahu of Israel presented Iran’s sophisticated ballistic missiles as a critical threat to Israel’s survival.

Israel unleashed a punishing barrage of strikes targeting the capital Tehran Sunday, after Prime Minister Benjamin Netanyahu vowed to make Iran pay "a very heavy price" for killing civilians, on the third day of fierce fighting.

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.

The region braced for a protracted conflict after Israel’s surprise bombardment of Iran’s nuclear and military sites on Friday killed several top generals and nuclear scientists, and neither side showed any sign of backing down.

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.

Three people have been killed in Israel, according to officials and local media, with both sides saying the strikes will continue.