Iran has used coordinated drone and missile attacks against three US bases in Jordan over five consecutive days, seeking to pressure Washington’s air-defense systems, the report said. On July 17, an Iranian missile penetrated defenses and struck temporary housing at a US base, killing three US service members and injuring more than 100. Several aircraft were also damaged in attacks on US bases in Jordan during the same week.

The report said Iran is deploying drones alongside ballistic, cruise and other missiles rather than relying on a single weapon. Some missiles can change direction suddenly, making them harder to detect and intercept. US Secretary of State Marco Rubio said nearly all missiles had been shot down, but one had slipped through. Defense analyst Seth G. Jones said simultaneous arrivals of different missiles and drones are making air defense more difficult.

Two people familiar with US weapons-stockpile information said the Pentagon had used more than 1,500 Patriot interceptors during the war and had fewer than 1,700 remaining. The report said Iran has also restored some missile facilities after US and Israeli strikes, while using underground and concealed locations to protect military equipment and key sites.