The Israeli military claims its campaign has eliminated high-value targets, including nine senior scientists, and severely damaged Iran’s nuclear infrastructure. Iranian authorities confirmed damage to four critical buildings at the Isfahan uranium conversion facility,

The military exchanges worsened between Israel and Iran overnight on Monday as strikes hit residential areas, killing and wounding civilians on both sides.

The retaliatory strikes came on Saturday, a day after Israel killed top Iranian military leaders and scientists and destroyed an aboveground nuclear enrichment plant near Natanz.

"The full strength and might of the U.S. Armed Forces will come down on you at levels never seen before," Trump warned.

The U.S. was represented at the UN Security Council's emergency session on Friday by State Department Senior Bureau Official McCoy Pitt, who said the U.S. was advised by Israel that the actions carried out against Iran overnight were "necessary for its self-defense."

Iran is planning to 'give a harsh response' to an Israeli attack launched early on Friday against its nuclear programme, an Iranian security source told Reuters.

Israel's Prime Minister Benjamin Netanyahu says his country will strike "every site and every target of the ayatollah regime" in Iran.

In all, at least 20 senior commanders were killed, two regional sources said. The head of the Revolutionary Guards aerospace force was also reported to be among them.