A portion of the Pentagon was evacuated Tuesday following the detection of a hazardous material incident. Pentagon spokesperson Sean Parnell confirmed that air quality sensors triggered the response, necessitating precautionary measures. Several floors were affected as officials investigated the source and nature of the issue. The evacuation was prompted by concerns regarding air quality, though the specific substance involved has not been disclosed. Authorities are working to determine the significance of the incident and ensure the safety of personnel. Normal operations are expected to resume once the situation is fully assessed and resolved. No injuries have been reported at this time.