Health officials are investigating whether someone returning to the New York City area from Florida spread the coronavirus at a high school graduation in suburban Westchester County.

Gov. Andrew Cuomo announced the investigation on Saturday after New York, New Jersey and Connecticut enacted 14-day traveler quarantines to try to check the spread of the virus.

A person “who had recently traveled to Florida and attended the ceremony subsequently began showing symptoms and tested positive for COVID-19,” the governor’s office said in a statement. “Since then, four more individuals who attended the ceremony and had contact with the first positive case have also tested positive.”

It’s suspected the infections occurred at a “drive in” graduation ceremony at Horace Greeley High School or at a related event a week ago in Chappaqua, New York, officials said. Anyone who attended the graduation is expected to self-quarantine until July 5, they said.

A message was left on Saturday seeking comment from school district officials.

(AP)