The "Glee" star's body was found in a Vancouver, British Columbia, hotel room Saturday afternoon. The actor had a history of substance abuse and had been to rehab several times.
"At this point there is no evidence to suggest Mr. Monteith's death was anything other than a most-tragic accident," the British Columbia Coroners Service said in a statement Tuesday.
"Mr. Monteith's family has been made aware of the circumstances surrounding the death," the statement said. "On behalf of family members, the B.C. Coroners Service asks that the media respect their privacy at this difficult time."
"There was evidence in the room that was consistent with a drug overdose," police spokesman Constable Brian Montague told People.com, without providing details.