JERICHO, Long Island (WABC) -- The FBI is conducting an investigation at the Underhill Preserve in Jericho, Long Island, according to FBI New York.
NewsCopter 7 was over the police scene Wednesday evening.
Sources told Eyewitness News they are conducting an investigation into MS-13 activity.
They say a person in custody claims there is a victim in the park. However, it's unclear what authorities found, and if it's human.
The FBI and police have not yet said what they are searching for.
This story will be updated as more information becomes available.
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