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Pentagon Locks Down Floors After Air Quality Issue Triggers Hazmat Response

Hazmat crews tested the building as officials said multiple floors were locked down and some employees were evacuated.

  • Multiple floors and corridors inside the Pentagon were locked down and partially evacuated Thursday morning following an unexpected hazardous materials scare.
  • Internal sensors triggered a building-wide air quality alert, prompting Pentagon spokesman Sean Parnell to confirm that internal systems "detected an air quality issue necessitating precautionary measures until we determine its significance."
  • The restrictions specifically impacted floors two through five within corridors four through seven of the massive military headquarters, with security teams ordering a shelter-in-place protocol for the affected zones.
  • The Arlington County Fire Department’s Hazardous Materials Team was dispatched to assist the Pentagon Force Protection Agency's own Hazmat unit, with emergency responders observed entering the area in full gas masks and chemical protection suits.
  • The incident coincides with a state of heightened security across U.S. military installations, unfolding amid severe, ongoing regional tensions and a rapid escalation of cross-border military strikes involving U.S. forces and Iran.
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Alarm at the Pentagon

A spokesperson for the US Department of War confirmed the air quality problem, and firefighters wearing masks are at work.

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One area of the building has been affected by "a problem of air quality", said the Pentagon spokesman. Local firefighters are on site and "precautionary measures" have been put in place, said Sean Parnell. - United States: part of the Pentagon placed in confinement after an incident "related to dangerous substances" (International).

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Telemundo 20 broke the news on Thursday, June 11, 2026.
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