Legendary actor Gene Hackman, 95, and his wife Betsy Arakawa, 63, were found dead in their Santa Fe home on Wednesday. Authorities confirmed their passing but have not yet determined a cause of death, though foul play is not suspected.

Santa Fe County Sheriff Adan Mendoza stated that officials are conducting a preliminary death investigation and awaiting a search warrant. Hackman and Arakawa were found in separate rooms—Hackman in a mudroom and Arakawa in a bathroom near a space heater. A prescription bottle and scattered pills were observed in the bathroom.

Hackman’s daughter, Elizabeth, told TMZ she suspects toxic fumes, possibly carbon monoxide poisoning. A gas company is assisting with the investigation. Reports suggest the couple had been deceased for an extended period, with their remains partially mummified.