The fighting, which began on Friday with a surprise Israeli attack on Iran, has been some of the fiercest and most prolonged in the decades-long enmity between Israel and Iran, raising fears of a wider war that could draw in the United States and other powers.

The U.S. did not provide any military assistance or have any involvement in Israel's Friday strike, a U.S. official told ABC News. The U.S. communicated to the Israelis that President Trump is opposed to a plan to kill Iranian Supreme Leader Ayatollah Khamenei,