Multiple floors of the Pentagon were locked down for several hours Thursday morning and hazmat crews were deployed for what authorities had described as a "hazardous materials incident."

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

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 building's systems detected an "air quality issue", a Pentagon spokesperson said, prompting a response from hazmat teams.

The Pentagon went into lockdown Thursday over an air quality issue, prompting the department to execute a shelter-in-place order for the affected area.

A “hazardous materials incident” at the Pentagon is prompting a Hazmat crew response on Thursday. According to Arlington Fire & EMS, multiple units, including their Hazardous Materials Team, are currently working the incident alongside the Pentagon Force Protection Agency’s Hazmat team.

The Pentagon went under a shelter-in-place order after emergency services were called for a hazardous materials incident Thursday, according to Arlington County Fire and

Authorities are responding to a "hazardous materials incident" at the Pentagon on Thursday, according to Arlington County fire officials.