President Donald Trump in about eight hours went from suggesting a nuclear deal remained “achievable” to urging Tehran’s 9.5 million residents to flee for their lives.

Donald Trump said his French counterpart Emmanuel Macron was wrong about the reason the US president left the G7 summit in Canada early, saying it was not to work on an Israel-Iran ceasefire.

Blasts have been heard in Tehran and sirens have sounded in Israel as US president convenes National Security Council.

President Donald Trump does not intend to sign a joint statement calling for de-escalation between Israel and Iran that had been drafted by G7 leaders in Canada, according to a person familiar with the matter,

President Donald Trump is abruptly leaving the Group of Seven summit, departing a day early Monday as the conflict between Israel and Iran intensifies and the U.S. leader has declared that Tehran should be evacuated “immediately.

The White House says the president cut short his visit because of "what's going on in the Middle East".

Donald Trump will leave the G7 summit in Canada early after issuing a stark warning for the immediate evacuation of Tehran, as the US president resisted signing a joint statement calling for de-escalation of Middle East hostilities.

"Let him go get a television network and say it so that people listen," the president fired off at the former Fox News star.

"American Forces are maintaining their defensive posture & that has not changed," the chief Pentagon spokesperson said.

By Anmol Choubey (Reuters) -Gold rebounded on Tuesday as heightened geopolitical uncertainty stemming from Israel-Iran fighting and U.S. President Donald Trump's call to evacuate Tehran led investors to seek safe-haven assets.