Authorities were investigating the cause of a noxious odor that affected several people Thursday night at Kauai Airport.

The odor overcame about 10 Transportation Security Administration workers at the central security checkpoint just before 7 p.m., said state Department of Transportation spokesman Dan Meisenzahl.

Airport firefighters and a Kauai County hazardous materials crew were sent to investigate. The roads going into the airport and the security checkpoint were closed for about 40 minutes while officials investigated. 

Testd did not find an hazardous odors or substances, Meisenzahl said.

No flights were cancelled or delayed as two other checkpoints were opened.

Meisenzahl said firefighters were investigating the source of the odor. The workers who went to the hospital were examined and determined to be fine, he said.