The FDNY responded to a report of a bus fire in the terminal just before 10 p.m.
Citizen App video captured first responders on the scene.
The fire was placed under control just after 11 p.m.
According to Port Authority, the main floor of the South Wing was temporarily closed and all lower-level South Wing departures were also temporarily suspended.
No injuries were reported.
Fire marshals are investigating the cause of the fire.
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