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

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

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

Trump and Putin spoke for about an hour on June 14, with the Kremlin saying the Russian leader condemned the Israeli military operation against Iran

Oil climbed early Monday with investors squarely focused on escalating geopolitical tensions as Israel and Iran continue to bombard each other with no sign of a pause.

Israel and Iran traded fresh missile strikes overnight, with both sides reporting high casualties. Iran claimed key generals were killed, while Israel said over 270 missiles had been fired since Friday.

The "America First" president praised his foreign policy record on Sunday while urging a deal between Iran and Israel amid escalating strikes.

The UK government is trying to walk a tightrope on relations with Israel, expressing support for its military action against Iran while also criticizing the war in Gaza.

Israel has rejected Keir Starmer’s calls for “de-escalation” in its war with Iran. The prime minister spoke out as the conflict continued, with both sides continuing to bomb one another. Speaking en route to the G7 summit in Canada,