The Joint Terror Task Force is now probing the sighting of the mysterious flying object, the sources said.
The Alitalia pilot spotted the unmanned craft — described as "a black drone" — hovering just 200 feet from his jet about three miles east of the airport as he made his approach from Brooklyn.
"He was very clear as to what he saw," a source said.
The pilot told investigators the object was flying at about 1,800 feet and looked like "a black drone about a meter square, with helicopter rotors on the corners."
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