Few other details were immediately available.
Sirens were sounding across Israel. The IDF said it was working to intercept the missiles.
Earlier, a White House official warned that Iran was preparing to launch an "imminent" ballistic missile attack on Israel.
The Pentagon is actively supporting Israel in its preparations to defend against the attack, according to the official who was not authorized to speak publicly. A direct attack on Israel will carry "severe consequences for Iran," the official said.