Gene Hackman seemingly had no health-related issues prior to his mysterious death … this according to the late actor’s daughter.

Speaking with the Daily Mail, Leslie Anne Hackman says, “there was no indication that there was any problem,” leading up to his tragic death. She also notes Gene did not recently undergo any significant surgeries.

While Gene was 95 years old, his daughter claims he was in very good physical condition, participating in activities like Pilates and yoga several times a week — with his wife, Betsy Arakawa, playing an imperative role in his healthy lifestyle. As we reported, a close friend of Gene’s tells us Betsy made sure GH stuck to a strict diet.

Leslie suspects her father and stepmother may have died from inhaling toxic fumes caused by a carbon monoxide leak … which aligns with what her sister, Elizabeth, told us on Thursday.

However, it’s worth noting when the fire department inspected the scene they didn’t find any signs of a carbon monoxide leak or poisoning.