Part of the Pentagon went into lockdown Thursday, a spokesman said, in response to what a local firefighter described as a "hazardous materials incident" at US military headquarters.
The Arlington County Fire Department said in a post on X that it had units "including our hazardous materials team" who operated in the Pentagon during what he described as a "hazardous materials incident."
Firefighters did not provide other details about the nature of the incident.
Pentagon spokesman Sean Parnell meanwhile said in a statement that the building’s security systems "have discovered an air quality problem that requires precautionary measures until we determine its significance."
Department of Defense "is executing standard protective protocols, including a shelter-in-place order for the affected area. Response teams are deployed and ready to support building occupants," Parnell added.
