Officials say they were testing for carbon monoxide at a Miami Gardens school after three children and two adults were hospitalized.
The Miami Herald reports that rescue workers responded to Carol City Elementary School Wednesday afternoon after the alarm on a carbon monoxide detector went off.
Miami-Dade Fire Rescue says units took patients to two different local hospitals. Their conditions weren't immediately known.
Classes weren't being held in observance of Yom Kippur, but the Miami-Dade County Public Schools calendar has Wednesday listed as a Teacher Planning Day.
Carbon monoxide is an odorless, colorless gas that is toxic to humans and animals.
