The American Airlines' jet had originated in Charlotte and had been parked in a hangar when the foetus was discovered early on Tuesday morning, the station said.
A cleaning crew discovered the fetus in the bathroom of a flight that arrived in NY from Charlotte, N.C., late Monday night, PIX11 reports. Sources told NBC New York that the fetus appears to have been 5 to 6 months old. After the flight arrived from Charlotte and passengers deplaned Monday night, the cleaning crew made the discovery in the bathroom Tuesday morning, sources say. It was the Airbus A321's only flight of the day.
The plane is out of service as the investigation continues.
The City Medical Examiner is working on determining how the fetus died.
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"We're investigating what we believe to be a human fetus found deceased on an airplane".
Details will not be released until after the investigation is complete, the statement said.
The Queens district attorney's office is investigating.
LGA tweeted about a delay due to the incident.
The flight is scheduled to depart from Charlotte-Douglas International Airport again Tuesday evening, August 7 en route to LaGuardia.