Actor Cory Monteith died from “mixed drug toxicity, involving heroin and alcohol,” according to the British Columbia Coroner’s Service.
NBC News reports the death of the 31-year-old Glee star, who was deceased for several hours when his body was discovered in his hotel room in Vancouver on Saturday, was accidental. According to the coroner’s report, the investigation in ongoing.
Monteith had been public about his battle with alcohol and drugs and had checked himself into rehab to battle substance addiction in March. He thanked his fans and supporters, which included girlfriend and costar Lea Michele, when he completed treatment a month later.
The Canadian-born actor was due to begin filming season five of the popular FOX musical-comedy series in two weeks. There’s no word yet on how writers will incorporate Monteith’s death into the storyline.