President Donald Trump said the United will come down on Iran “at levels never seen before” if the Middle Eastern country attacks.

Follow live updates as Iran retaliates after Israel strikes nuclear facilities. Stay informed with real-time news and developments.

It follows daytime attacks from both sides, with Israeli strikes in Tehran continuing and Iran firing more missiles towards Israel.

The conflict between Israel and Iran entered uncharted territory as the two rivals warned that the worst could still come after multiple days of airstrikes. Debora Patta reports from Tel Aviv and Holly Williams has the latest from Iraq's border with Iran.

Israel unleashed airstrikes across Iran for a third day Sunday and threatened even greater force as some Iranian missiles evaded Israeli air defenses to strike buildings in the heart of the country. Planned talks on Iran’s nuclear program,