A major fire erupted early Sunday at the United Kingdom’s RAF Fairford airbase, which has been used in operations against Iran. According to reports, firefighters from Gloucestershire Fire and Rescue Service battled the blaze for several hours before bringing it under control. Video footage shared on social media showed smoke rising from the base’s commissary building, whose roof collapsed due to the intensity of the fire. Authorities advised nearby residents to keep doors and windows closed. No casualties or damage to Royal Air Force aircraft were reported.

The British government had allowed the U.S. Air Force to use the base after the Middle East war began in March. American bombers have been deployed from Fairford for so-called defensive missions against Iran, reducing flight time from the U.S. by nearly half. On Saturday, around 200 protesters gathered outside the base, calling for an end to the war in Iran and the withdrawal of U.S. forces from British bases.

RAF Fairford, built in 1944, is one of only two European bases capable of hosting all three U.S. long-range bombers: the B-1 Lancer, B-2 Spirit, and B-52 Stratofortress.