An air quality issue related to a hazardous materials incident has caused multiple floors to be locked down at the Pentagon on Thursday.

Multiple floors of the Pentagon were locked down Thursday after hazmat crews were deployed for what authorities described as a "hazardous materials incident." CBS News New York's Jessica Moore reports.

Emergency crews responded to a hazmat incident at the Pentagon on June 11, according to local and federal officials.

Multiple floors and corridors inside the Pentagon have been locked down and others are being evacuated, three sources familiar and the local fire department said. A Pentagon spokesman told CNN that systems within the Pentagon “have detected an air quality issue necessitating precautionary measures until we determine its significance.

Pentagon safety systems detected an air quality issue Thursday, prompting a shelter-in-place order and hazmat response as officials investigated a reported chemical spill.

Virginia emergency crews deployed to the Pentagon on Thursday morning for what authorities described as a “hazardous materials incident.”Pentagon spokesman Sean Parnell confirmed that “sophisticated systems” had “detected an air quality issue necessitating precautionary measures until we determine its significance.

The Pentagon issued a shelter-in-place order because of a “hazardous material incident,” officials said Thursday. Nearly half the Pentagon—four corridors on three floors of the five-story building— are locked down,

The Pentagon's systems "detected an air quality issue necessitating precautionary measures until we determine its significance," a spokesman said Thursday morning.