CBRN event in United States of America on Thu 11th June 2026

11th June 2026

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The Pentagon was locked down and partially evacuated on Thursday due to a false alarm by a hazardous materials sensor, two sources familiar told CNN. Multiple floors and corridors inside the building had been locked down and others were evacuated due to a “hazardous materials incident,” three sources familiar and the local fire department said earlier on Thursday. At 1:31pm Pentagon spokesman Sean Parnell posted on X that “normal operations have resumed” at the Pentagon.

Contextual analysis

Analysing the event count by highlighting the presence of munition categories over a six-month data period.

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Information sources

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United States of America (USA)

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Events using similar munitions or platforms and those that happen within a recent time line and proximity are displayed below.

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