Hazmat crews responded to the Pentagon Thursday to investigate a 'hazardous materials incident'.
As a precaution, the Pentagon was locked down.
Pentagon spokesman Sean Parnell tells CBS News the Pentagon's systems detected "air quality issue" and a shelter-in-place was in effect.
"The Pentagon has sophisticated systems to ensure the safety of the building and its occupants. Those systems have detected an air quality issue necessitating precautionary measures until we determine its significance. The Department is executing standard protection protocols, including a shelter-in-place order for the affected area. Response teams are in place and ready to support building occupants."
Parnell later posted:
“Earlier this morning, Pentagon occupants were notified of a potential air quality issue, prompting immediate precautionary safety measures and evaluation. Subsequent testing confirmed no hazard exists, and normal operations have resumed.
“We express our sincere appreciation to the first responders for their swift actions to ensure the safety of all personnel.”
SPECIAL REPORT: Pentagon locked down due to hazmat situation https://t.co/uGtBE2LP4p
— CBS News (@CBSNews) June 11, 2026
ACFD units, including our Hazardous Materials Team, are currently operating at the Pentagon in support of PFPA’s Hazmat Team during a hazardous materials incident. pic.twitter.com/7qzOzbwh8W
— Arlington Fire & EMS (@ArlingtonVaFD) June 11, 2026
