Airport spokeswoman Michele Dynia said it's unknown if the passengers drank from the fountains in Terminal A but they were closed out of an abundance of caution and will be tested.
At least six unrelated passengers reportedly fell ill aboard Frontier Airlines Flight 1397 from Cleveland to Tampa on New Year's Day, prompting concerns that airport water fountains may have been to blame. According to a now-deleted Instagram post by passenger Sandra Palomino, travelers were awaiting clearance by the Centers for Disease Control and Prevention and were eventually deplaned at 4:30 PM EST.
TIME could not immediately reach representatives from Hopkins Airport or Frontier Airlines for further comment.
WFLA-TV reported health officials boarded the plane when it landed at Tampa International Airport on Tuesday afternoon and the sick passengers were removed. Passenger safety is Frontier's number one priority. After you're briefed on that, they are going to release you.
"CDPH, Cleveland Water and CLE airport staff are working collaboratively to investigate all potential causes, including passenger activities before arriving at the airport", the city statement said.
Officials have not disclosed symptoms experienced by passengers.