Nothing was found, according to the authorities:
A preliminary investigation found no evidence of gunfire in a terminal at New York’s John F. Kennedy International Airport on Sunday, despite earlier reports of shots being heard, the airport’s operator said.
No gun casings were found after a search of Terminal 8, where reports of gunshots in the departures area prompted an evacuation, the Port Authority of New York and New Jersey said in a message on social network Twitter.
“The terminal was evacuated out of an abundance of caution,” the agency said. “Travelers should contact their carriers.”