Pentagon "hazardous materials incident" prompts response from hazmat crews

U.S. Pentagon "hazardous materials incident" prompts response from hazmat crews By Stephen Smith Stephen Smith Managing Editor Stephen Smith is a managing editor for CBSNews.com based in New York. A Washington, D.C. native, Steve was previously an editorial producer for the Washington Post, and has also worked in Los Angeles, Boston and Tokyo. Read Full Bio Stephen Smith June 11, 2026 / 11:50 AM EDT / CBS News Add CBS News on Google Hazmat crews deployed to the Pentagon on Thursday and a shelter-in-place was in effect for what authorities described as a "hazardous materials incident."In a social media post, the Arlington County Fire Department said emergency units, including its hazardous materials team, were "operating at the Pentagon in support of PFPA's Hazmat Team during a hazardous materials incident."Pentagon spokesman Sean Parnell confirmed that a shelter-in-place was in effect for affected areas."The Pentagon has sophisticated systems to ensure the safety of the building and its occupants," Parnell said. "Those systems have detected an air quality issue necessitating precautionary measures until we determine its significance."This is a developing story and will be updated. Eleanor Watson contributed to this report. .component--type-recirculation { .item:nth-child(7), .card-recirc:nth-child(7) { display: none; } } #inline-recirc-item--id-d4c5590b-35b6-4663-bb42-f2562b095dc1, #right-rail-recirc-item--id-d4c5590b-35b6-4663-bb42-f2562b095dc1 { display: none; } #inline-recirc-item--id-d4c5590b-35b6-4663-bb42-f2562b095dc1 ~ .item:nth-child(7) { display: block; } In: Pentagon © 2026 CBS Interactive Inc. All Rights Reserved.