FAIRCHILD AIR FORCE BASE, Wash. -- Officials said Friday that multiple air fresheners in a confined space are to blame for a hazmat response a Fairchild Air Force Base on Thursday.

Hazmat crews were called to the Logistics Readiness Squadron around 8:30 a.m. Thursday. Authorities said 24 personnel reported feeling sick. By 3:30 p.m., all the victims were treated for their symptoms and had recovered, according to officials.

Investigators said the incident was caused by multiple air fresheners that were placed in a confined area and when the HVAC system turned on it caused people to feel ill.

The facility has reopened and everyone is back at work.