Actor Gene Hackman, 95, and his wife, Betsy Arakawa, 65, both tested negative for carbon monoxide, authorities revealed Friday, amid an investigation after they were mysteriously found dead alongside one of their dogs at their home in Santa Fe,

New Mexico authorities continue to probe the deaths of Gene Hackman and his wife, Betsy Arakawa, whose bodies were found in their Santa Fe home on Wednesday under “suspicious" circumstances.

Gene Hackman and his wife Betsy Arakawa tested negative for carbon monoxide in the initial results of the toxicology report, leading officials to rule out the gas as a cause of Hackman and Arakawa’s death, Sheriff Adan Mendoza said in a press conference on Friday.