The blaze began around 1:17 p.m., Thursday, Nov. 12, at 37 Peconic Bay Avenue in North Sea, in the Roses Grove community, said Southhampton Police Lt. Susan Ralph.
The Noth Sea Fire Department responded and requested further assistance from Sag Harbor and Southampton Fire Departments.
When firefighters arrived on the scene, the house was fully engulfed in flames, Ralph said.
As crews were extinguishing the fire a man was located in the residence and died in the residence, she added.
Southampton Town Fire Marshals and the Suffolk County Police Department Arson Squad responded to assist Southampton Town Detectives with the investigation.
The victim’s identity is being withheld pending notification of next of kin.
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