The deployment comes on the eve of the US election, with speculation that the Iranian attack could come before or after the election.

Earlier this month, the United States sent its THAAD air defense system to Israel along with 100 troops, expecting strong retaliation for Israel’s four-hour bombing raid across Iran.

At the time, Pentagon spokesman Pat Ryder said: “This action underscores the United States’ unwavering commitment to the defense of Israel and to the defense of Americans in Israel from any new ballistic missile attack by Iran.”