Arlington County fire and rescue teams were deployed to the Pentagon on Thursday to investigate reports of a hazardous materials incident. As a precaution, officials initiated evacuations across several floors of the building, and the facility was placed under a temporary lockdown to ensure the safety of all personnel inside.

While details regarding the nature of the substance remain limited, emergency crews are currently on-site working to secure the area and assess the situation. Authorities have not yet released further information about potential injuries or the source of the threat, and updates are expected as the investigation continues.