The U.S. says it wasn't involved in the strikes on Iran, but three American officials told NBC News the U.S. is assisting in shooting down Iranian missiles and projectiles targeting Israel.

Iran launched retaliatory strikes on Israel after Netanyahu said Israel began an operation to push back on Iran's "threat to Israel's very survival."

The latest U.S.-Iran talks on Tehran's rapidly advancing nuclear program will not take place Sunday, mediator Oman said Saturday, as Israel and Iran traded blows a day after Israel's blistering attack on Iranian nuclear and military sites.