(CNN): Initial findings from preliminary autopsies performed on Oscar-winning actor Gene Hackman and his wife, Betsy Arakawa, revealed no external trauma on either individual. This was confirmed by the Santa Fe County Sheriff’s Office on Thursday.

Hackman and Arakawa were found dead in their New Mexico home on Wednesday, along with their dog. Hackman passed away at the age of 95.

The cause and manner of their deaths have not been determined yet, according to the sheriff's office. The investigation remains open and ongoing.

Official autopsy and toxicology reports are still pending. Carbon monoxide and toxicology tests have been requested for both Hackman and Arakawa.

While authorities do not suspect foul play in their deaths, they have not ruled it out entirely. The sheriff’s office noted that the circumstances surrounding the deaths appeared suspicious enough to warrant a thorough investigation.

Santa Fe County Sheriff Adan Mendoza emphasized that no signs of a struggle or forced entry were found in the home. There were also no indications that items had been stolen.

The couple’s bodies had been deceased for several days before discovery, according to the sheriff. However, there was no apparent sign of foul play.

Sheriff Mendoza mentioned that the investigation would proceed cautiously, with a focus on facts. He highlighted the importance of the upcoming autopsy and toxicology reports in determining the cause of death.

The initial public statement from the sheriff’s office indicated that foul play was not suspected at that moment. 

The search warrant application sought permission to look for any possible combustible materials, controlled substances, weapons, DNA, or other evidence that could shed light on the cause of death.

According to the affidavit, pills were found scattered near the body of Betsy Arakawa. She was discovered lying on the floor inside a bathroom, with an open bottle of prescription pills on a nearby countertop.

A space heater was found near Arakawa’s head, and their dog was discovered dead in the bathroom closet, as noted in the affidavit.

Gene Hackman’s body was found in another room, near the kitchen. A deputy investigating the scene suspected that Hackman had collapsed suddenly.

Both Hackman and Arakawa seemed to have died several days before their bodies were found. The authorities noted that they had been deceased for some time before being discovered.

Two other healthy dogs were found in other parts of the property. There were no signs of forced entry or theft, and the front door was found open but unsecured.

The first person to find the dead was someone claiming to be a caretaker. Shortly before 2:00 p.m. local time on Wednesday, the caregiver reported the situation to 911.

The caregiver, who was unable to enter the house but could see two unconscious people through the window, tearfully detailed the scenario during the 911 call.

The caretaker urgently requested that authorities send someone immediately, saying, “No, dude, they’re not moving. Just send somebody out here really quick.”

The investigation found no immediate signs of a carbon monoxide or natural gas leak in the house, though these possibilities were still under consideration.

Authorities applied for a search warrant to investigate further, requesting permission to look for evidence of combustible materials, controlled substances, weapons, DNA, and other potential clues.

It was unclear if the more thorough search had already taken place or if any additional evidence had been seized by the investigators.

Chris Ramirez, a spokesperson for the New Mexico Medical Examiner's office, stated that medical examiner’s reports generally take four to six weeks to be completed and provide the final cause of death.

Sheriff Mendoza emphasized the need for thoroughness in the investigation. He expressed a desire to release accurate and appropriate information once all the facts were gathered.

Gene Hackman’s family released a statement, expressing their deep sadness over the loss of the actor and his wife. They shared how Hackman was loved and admired by millions but was also, to them, simply “Dad and Grandpa.”

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Hackman’s daughters and granddaughter also acknowledged the significant loss, saying, “We will miss him sorely.”

Gene Hackman’s death occurred just days before the Academy Awards ceremony, leading to tributes from fans and industry professionals alike.

A source close to the Oscars ceremony revealed that Hackman would be honored at Sunday’s event. Although the details were not confirmed, there were discussions of including him in the “In Memoriam” segment or mentioning his passing on stage.

In his fifty years in Hollywood, five times nominated actor Hackman won two Academy Awards. His performances in "The French Connection," "Unforgiven," "Hoosiers" and "The Firm" are mainly recognizable.

Hackman's portrayals of conflicted authority figures or sinister villains, such as Lex Luthor, were especially well-known in the Superman movies of the '70s and '80s.

The first Oscar Hackman won for portraying the character of New York detective Popeye Doyle in the film The French Connection, the second was for 1992's Unforgiven, where he played the brutal sheriff Little Bill Daggett, also directed by Clint Eastwood.

His five-decade stay in Hollywood contained an Oscar for the projects performed by Hackman, and then there came his five nominations. Some of his performances are mostly hailed from roles in films such as "The French Connection," "Hoosiers," "Unforgiven," and "The Firm."

He was much known as the conflicted authority figure or crafty fool villain, like when playing Lex Luthor in the “Superman” films of the 1970s and '80s.

Hackman took home his first Oscar in this role in 1971 for "The French Connection," where he played New York detective Popeye Doyle. His second Oscar was for playing the violent sheriff Little Bill Daggett in Clint Eastwood's "Unforgiven" (1992).