UPDATE: From MTV, where you can read more of the story…

Cory Monteith died of “a mixed drug toxicity, involving heroin and alcohol,” the British Columbia Coroners Service announced late Tuesday.

Earlier in the day, the coroner’s office had revealed that the initial autopsy of the 31-year-old actor was inconclusive, and had ordered toxicology tests to pinpoint the actor’s cause of death.

In their announcement of Monteith’s cause of death, the Coroners Service added that their investigation into the case was continuing, but added that “there is no evidence to suggest Mr. Monteith’s death was anything other than a most-tragic accident.”

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CNN reports:

Cory Monteith, who played heart throb Finn Hudson in the Fox hit “Glee,” was found dead in a Vancouver hotel room Saturday, Vancouver police said. He was 31.

Police said the cause of death was not immediately apparent, but they ruled out foul play.

Monteith spent time in rehab early this year, checking into a drug addiction treatment facility in April.

He had been frank about his struggles with substance abuse, telling Parade magazine in 2011 that he began using drugs at 13, and by 19 went into rehab after his mother and friends intervened.

Monteith had been on the musical comedy show since it began in 2009.

In 2011, he won a Teen Choice award for top actor in a comedy. The show’s cast won a Screen Actors Guild award for an ensemble in a comedy the prior year.