In sweeping attacks that started early Friday, Israel has struck at the regime in Tehran, targeting Iranian nuclear and military assets. The Israeli strikes have killed more than 70 people, including four top security chiefs, and damaged Iran’s main nuclear site at Natanz.

Tehran said American bases in the Middle East could face reprisals if the U.S. helped repel Iranian attacks on Israel.

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

The two sides were due to meet for a sixth round of negotiations on Sunday. Tehran suggested that it had not yet decided whether to participate, given Israel’s attack on its nuclear infrastructure.

Iran's top diplomat said Saturday that talks with the United States were "unjustifiable" after Israeli strikes on his country.

Follow the latest news after Israel launched strikes at Iran, a dramatic escalation in long-running tensions between the two countries.

The United States is the main international backer of Israel, Iran's biggest regional foe. It is also a close ally of Sunni Gulf monarchies which for years pursued their own rivalry with the Islamic Republic, seeing it as their main regional threat.

The United States has pulled some diplomatic staff and military families out of the Middle East, citing unspecified regional security risks.

G7 will also be a platform for Canadian PM Carney to showcase his leadership at a time of economic, geopolitical shifts.