The Pentagon went on lockdown on Thursday while some floors were evacuated. The Pentagon went on lockdown on Thursday while some floors were evacuated. CNN's Haley Britzky reported on the issue and said on X “Multiple floors and corridors inside the Pentagon have been locked down and others are being evacuated, three sources familiar with the situation told CNN.” An aerial view of the Pentagon, which houses the US Department of Defense headquarters, in Arlington, Virginia. (AFP)Why Pentagon went on lockdown?Arlington Fire & EMS confirmed the incident at the US military headquarters. They noted that there was an incident linked to hazardous materials.“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,” the statement read.The CNN reporter also noted Pentagon spokesperson Sean Parnell confirm that systems within the Pentagon had detected “an air quality issue necessitating precautionary measures until we determine its significance.”(This is a developing story)Shuvrajit has over seven years of experience covering US, India, and world news. An English Literature postgraduate from Jadavpur University, Shuvrajit started off covering entertainment, gaming and all things pop culture. There were brief periods away from the media industry, with short stints in content marketing, ed-tech and academic editing.