A coroner's report issued today revealed Star Wars icon Carrie Fisher had cocaine and other drugs in her system in December when she suffered a cardiac arrest on a flight to Los Angeles and later died. However, investigators were unable to determine what role those substances may have played in her death.

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According to the Los Angeles Times, the toxicology review also specifies that evidence of cocaine, methadone, ecstasy, alcohol and opiates were found when Fisher was rushed Dec. 23 from Los Angeles International Airport to Ronald Reagan UCLA Hospital. She passed away four days later at age 60. Tests indicate the actress, who spoke openly about her decades-long struggle with addiction, may have taken cocaine within three days of death.

The report follows an announcement on Friday from the Los Angeles County Coroner's Office that listed Fisher's cause of death as sleep apnea and other factors. The coroner's statement also cited "atherosclerotic heart disease, drug use" as "other conditions."

Fisher's daughter, actress Billie Lourd, issued a statement on Friday to People that addressed the initial findings. “My mom battled drug addiction and mental illness her entire life," she said. "She ultimately died of it. She was purposefully open in all of her work about the social stigmas surrounding these diseases.

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“She talked about the shame that torments people and their families confronted by these diseases," Lourd continued. "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.”

Fisher's death was followed Dec. 28 by that of her mother, actress Debbie Reynolds. They were buried together in January, with Fisher's ashes placed in her prized possession, an urn designed to look like a Prozac pill.