Iran launched a missile attack Monday on a U.S. military base in Qatar, retaliating for the American bombing of its nuclear sites.

Witnesses reported seeing missiles in the skies, followed by explosions, but it wasn’t clear if there was any damage.

Iran announced on state television that it attacked American forces stationed at Qatar’s Al Udeid Air Base. A caption on screen called it “a mighty and successful response” to “America’s aggression” as martial music played.

The attack came shortly after Qatar closed its airspace as a precaution amid threats from Iran.