Meanwhile Donald Trump says his early G7 exit has "nothing to do" with an Israel-Iran ceasefire, as fighting between the two nations enters a fifth day.

Iran's Revolutionary Guard Corp, which Israel has been battering with increasing intensity, were inevitably a prime target as the guardians of a regime built on hatred of the West and after decades of violent subversion often enacted with the aid of that other enemy of the West: Russia.

Iran's president, Masoud Pezeshkian, calls for unity among citizens as the country faces escalating conflict with Israel, urging them to set aside differences in the face of 'genocidal criminal aggression'.

Iran unleashed a missile barrage on Israeli cities Monday after Israeli strikes deep inside the Islamic republic, leaving streets in ruins and the death toll in Israel climbing by 11 amid a spiralling air war.

The deadly conflict between Israel and Iran has entered a fourth day, with both sides firing waves of missiles. Follow for live updates.

Iran's supreme leader, Ayatollah Ali Khamenei, has weathered a series of challenges but Israel's unprecedented strikes mark his most serious crisis yet, threatening both the clerical system he leads and his own physical survival.

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.

"Iran and Israel should make a deal, and will make a deal," says US President Donald Trump, adding that he will be the one to make it happen. In a social media post, Trump points to recent tensions between countries around the world which he says he helped to stop.