Two air force jets flying low over Brazil's capital Brasilia have shattered the windows of the supreme court.
The incident was witnessed by people who had gathered to watch the flyby during a changing of the flag ceremony, which takes place every month.
Two Mirage 2000s were taking part in the display over the Plaza of the Three Branches when a "shockwave caused damage to the windows of some public agencies," the air force said in a brief statement.
Nearly all of the glass facade of the supreme court building was destroyed because of the vibrations.
City firefighters reported that some members of the public had been scared, but no one was hurt.
The air force said it was investigating and has offered to pay for the replacement windows.