Israel said it launched airstrikes against Iranian missile launchers and a nuclear research site Tuesday, and Iran struck back against Israel and across the Gulf region, targeting US embassies and disrupting energy supplies and travel. Four days into a war that President Donald Trump suggested would last several weeks or perhaps longer, nearly 800 people have been killed in Iran, including some Trump said he had considered as possible future leaders of the country. Explosions rang out on Tuesday in Tehran and in Lebanon, where Israel said it retaliated against Hezbollah militants. The American embassy in Saudi Arabia and the US consulate in the United Arab Emirates came under drone attacks. Iran has fired dozens of ballistic missiles at Israel, though most of the incoming fire has been intercepted. Eleven people in Israel have been killed since the conflict began. The spiralling nature of the war raised questions about when and how it would end. The administration has offered vario