The U.S. Naval Academy in Annapolis, Maryland, went into lockdown on September 11, 2025, after reports of potential threats prompted an immediate security response.

Video footage from the scene shows law enforcement personnel moving cautiously through the campus as precautionary measures were taken. Authorities later confirmed the threats were a hoax, but emphasized that the swift lockdown reflected the heightened alert status on the 24th anniversary of the September 11 attacks—a day of national remembrance and increased security vigilance.

Officials stated that while no credible danger was found, such incidents are taken seriously given the symbolic significance of the date and the importance of protecting a key U.S. military institution. The investigation into the source of the hoax threats remains ongoing.