Nassau police said a man was pronounced dead after he...

Nassau police said a man was pronounced dead after he was found "unconscious near the shore" in Atlantic Beach Monday night . Credit: Jim Staubitser

Police are investigating the circumstances surrounding a man who was believed to have drowned off Atlantic Beach on Monday, authorities said.

Nassau County police said the man, whose identity has not been released, was discovered at 7:24 p.m. Police said officers responding to a 911 call found him "unconscious near the shore" near the Silver Point Beach Club.

The man was transported to a nearby hospital, where he was pronounced dead, police said.

Officials from the Inwood Fire Department said in an official social media page post that they, Atlantic Beach EMS and emergency responders from the Lawrence-Cedarhurst and Long Beach fire departments responded to the scene, and said a man was found and that "it was determined to be a drowning."

Police said homicide detectives are investigating, which is routine in such circumstances, and said the medical examiner will determine a cause of death.

Suffolk County Sheriff Errol Toulon Jr. spoke with NewsdayTV's Ken Buffa about what life is like for the Gilgo Beach serial killer Rex Heuermann in jail. Credit: Anthony Florio; File Footage; Photo Credit: Newsday / James Carbone, John Paraskevas; AP / David Bookstaver, Clark County Sheriff's Office, Richard Drew, Mitchell Tapper, Don Ryan; Peconic River Sportsman’s Club / Kerry Goldberg

'He will be ... coming out of prison in a body bag' Suffolk County Sheriff Errol Toulon Jr. spoke with NewsdayTV's Ken Buffa about what life is like for the Gilgo Beach serial killer Rex Heuermann in jail.

Suffolk County Sheriff Errol Toulon Jr. spoke with NewsdayTV's Ken Buffa about what life is like for the Gilgo Beach serial killer Rex Heuermann in jail. Credit: Anthony Florio; File Footage; Photo Credit: Newsday / James Carbone, John Paraskevas; AP / David Bookstaver, Clark County Sheriff's Office, Richard Drew, Mitchell Tapper, Don Ryan; Peconic River Sportsman’s Club / Kerry Goldberg

'He will be ... coming out of prison in a body bag' Suffolk County Sheriff Errol Toulon Jr. spoke with NewsdayTV's Ken Buffa about what life is like for the Gilgo Beach serial killer Rex Heuermann in jail.

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