A terminal at Fort Lauderdale-Hollywood International Airport was closed for a time after an unknown chemical sent five people to the hospital with respiratory complaints.
Terminal 2 was evacuated for about two hours Friday as hazardous materials technicians investigated what caused several people to become ill.
The cause remains under investigation, though an airport spokesman says it appears an aerosol can discharged.
Broward County Sheriff Fire Rescue spokesman Mike Jachles says three Transportation Security Administration agents and two passengers were affected by the irritant.
Investigators collected air samples and determined it was safe for people to re-enter. More than 1,000 passengers have been delayed and several inbound flights were diverted to other airports.