Riverhead police, along with Suffolk County detectives, were called to Grangabel Park to investigate a possible drowning about 4:20 p.m.
Once on the scene, officers found the body of an unidentified man in the Peconic River, Suffolk police said.
As of Monday, June 17, police had not identified the man.
Police said the incident was not criminal in nature, and the man may have drowned. The investigation is ongoing.
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