Iran launched an attack on an American military base in Qatar on Monday in retaliation for U.S. strikes on three critical nuclear sites.

A U.S. official said that Al Udeid Air Base, the largest American installation in the Middle East, was attacked by short-range and medium-range ballistic missiles. “At this time, there are no reports of U.S. casualties,” a U.S. defense official told The Intercept. “We are monitoring this situation closely and will provide more information as it becomes available.”

A Qatari official confirmed that no casualties occurred due to the attack.

The Qatari official said that Al Udeid Air Base, which it shares with the United States, had been “evacuated” prior to the attack and that all “necessary measures were taken to ensure the safety of the base’s personnel, including members of the Qatari Armed Forces, friendly forces, and others.”

Iran said the strikes in Qatar matched the number of bombs dropped by the United States on its nuclear sites over the weekend, signaling its likely desire to save face at home and deescalate abroad.

Iran announced the attack on state television. A caption on screen called it “a mighty and successful response” to “America’s aggression,”

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