Cory Monteith died of an accidental heroin overdose, according to a final report issued by the British Columbia's Ministry of Justice on Wednesday.

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The "Glee" star was found dead in a Vancouver hotel room July 13, 20013. He was 31.

Billboard.com quoted the B.C. coroner's report as saying Monteith died of a mixed drug cocktail involving "intravenous heroin use combined with the ingestion of alcohol."

The report also noted investigators on the scene discovered "a spoon with drug residue and a used hypodermic needle, along with two empty champagne bottles and glasses" when they entered Monteith's room after he did not check out of the hotel as scheduled.