The decomposing body of a 75-year-old man was found Wednesday inside a Brooklyn home that contained schematics of potentially hazardous materials and weapons of mass destruction, police and sources said.
Authorities made the grisly discovery during a welfare check shortly before 1 p.m. on 101 Avenue in Cypress Hills, police said.
Sources said the man appeared to have been dead for at least a week. The medical examiner will determine the cause of his death, police said.
Authorities are also investigating suspicious materials found in the home, including cartridges bearing biohazard labels and schematics for weapons of mass destruction, law enforcement sources said.
The NYPD said it was probing the validity of the content found in the house.
Sources said the block had been closed and the FBI was also on the scene on Wednesday.
Police have yet to identify the body pending notification from the family.
New York Post