The Port Authority, which manages the city's airports, in an initial update said police had received reports of shots fired at Terminal 8 at JFK at about 9:30 pm (local time yesterday), apparently near the departure area.
Just half an hour later, at about 10:15 pm (local time), Terminal 1 at New York's main airport was also "closed" after "additional" calls of shots fired were received.
Hundreds of travellers were evacuated from the terminals and severalflights in and out of the airport were cancelled and diverted as a precautionarymeasure.
There were scenes of panic as authorities asked people to lie down and then asked them to evacuate.
More From This Section
However, after conducting a thorough search, police gave an all-"clear" and said emergency calls over shots at the airport were "unfounded".
Wedin said in an earlier tweet that police officials from New York City and the Port Authority, which also operates and manages airports in New Jersey, were clearing the departure areas at Terminal 1 and 8 at JFK.
"There is nobody shot. It appears that no shots have been fired," he said.
A preliminary investigation also showed no indication that shots were fired.
"Preliminary investigation does not indicate shots were fired at JFK. There are no injuries. At this time no gun shells or other evidence of shots fired has been found," the Port Authority said in a statement on its Twitter handle.
It was not immediately known if there were any injuries or arrests as part of the incident.