MONTGOMERY TOWNSHIP, N.J. (AP) -- The death of a hospital executive's wife who was pulled from her burning home in September has been ruled a homicide.

John Sheridan, President and Chief Executive Officer of The Cooper Health System addresses a gathering in Camden in 2013 (AP Photo/Mel Evans, File)

But authorities still haven't determined what caused the death of her husband, who also was killed in the fire.

The findings were noted in recently filed death certificates for 69-year-old Joyce Sheridan and her 72-year-old husband, John, according to several published reports.

The Somerset County Prosecutor's Office has not said what caused the couple's deaths on Sept. 28. But they have said that a fire at the home that morning was set intentionally.

Joyce Sheridan was a retired teacher, while John Sheridan worked at Cooper University Hospital in Camden. He also served as a state transportation commissioner, along with other government roles and as a private lawyer.

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