The Coast Guard is investigating a report of a possible downed aircraft, which was found eight miles north of the Mattituck Inlet.
According to the U.S. Coast Guard, "At approximately 8:50 a.m., Coast Guard Sector Long Island Sound command center received notification from another aircraft operating in the vicinity. The aircraft was described as a small, white, experimental aircraft with a parachute deployed. A rescue boatcrew from Coast Guard Station New Haven from New Haven, Conn., are searching along with Suffolk County Marine as well as Riverhead and Southhold Emergency Medical Services."
Update: The Coast Guard says, "Mattituck Fire Department divers responded and recovered a body from the aircraft." The victim was the plane's male pilot, and it seems that he was the only person on the plane. Newsday reports, "The FAA said the Coast Guard later confirmed the aircraft that crashed was an experimental, amateur built fixed-wing Raven powered by a Lycoming engine. FAA records indicate it is registered in New York."
The National Transportation Safety Board will be leading the crash investigation.