Carrie Fisher's cause of death revealed by Los Angeles County Coroner's Office

Contributing factors to Carrie Fisher's 2016 death were released by the Los Angeles County Coroner's Office on Friday, and though "cardiac arrest" was listed as the cause of death on her death certificate, L.A. County coroners say there's more to the story.

The LA Times is reporting that Fisher’s death was as a result of several factors, including sleep apnea, drug use and heart disease.

The coroner's office on Friday released a statement that said "the manner of death has been ruled undetermined." Under “How Injury Occurred," the coroner's office listed "Multiple drug intake, significance not ascertained."

In a statement provided to People Magazine, Fisher's daughter, actress Billie Lourd expressed her remorse at her mother's history of drug use.

Lourd said:

“My mom battled drug addiction and mental illness her entire life. She ultimately died of it. She was purposefully open in all of her work about the social stigmas surrounding these diseases.

"She talked about the shame that torments people and their families confronted by these diseases. I know my Mom, she’d want her death to encourage people to be open about their struggles. Seek help, fight for government funding for mental health programs. Shame and those social stigmas are the enemies of progress to solutions and ultimately a cure. Love you Momby."

The L.A. County Coroner's Office said that a more in-depth report concerning the manner of Fisher's death would be forthcoming.

Fisher died on Dec. 27, 2016 just four days after suffering an apparent heart attack while flying from London to Los Angeles. Fisher was 60 years old at the time of her death.

Her mother, Debbie Reynolds, suffered a massive stroke and passed away on Dec. 28, 2016, just a day after her daughter's death.

Correction: The original version of this article stated Debbie Reynolds' last name was Fisher. Corrections are reflected above.