WASHINGTON—The Biden administration is sending an advanced antimissile system to Israel along with American troops to operate it, moving to bolster its top Middle East ally’s defenses against an Iranian attack,

The United States will send a T erminal High Altitude Area Defense battery to Israel, along with the troops needed to operate it, the Pentagon said Sunday, even as Iran warned Washington to keep American military forces out of Israel.

Iran’s government is extremely nervous and has been engaging in urgent diplomatic efforts with countries in the Middle East to gauge whether they can reduce the scale of Israel’s response to its missile attack earlier this month and – if that fails – help protect Tehran,