The Israelis had the opportunity to assassinate Supreme Leader Ayatollah Ali Khamenei and President Trump conveyed to Prime Minister Benjamin Netanyahu that it wasn't a good idea, one U.S. official told CBS News.

Iran fired a new wave of missile attacks on Israel early on Monday, triggering air raid sirens across the country as emergency services reported at least five killed and dozens more wounded in the fourth day of a conflict between the regional foes that shows no sign of slowing.

Israel’s attack on Iran was long in the making – the result of years of meticulous planning by Israel and days of high-stakes talks between Tel Aviv and Washington, officials told CNN.