Revealed: Cory Monteith died from heroin and alcohol overdose

Cory Monteith died from a lethal combination of heroin and alcohol, it has been revealed.

The Glee actor, who was found dead in his hotel room on Saturday at the age of 31, died from a 'mixed drug toxicity, involving heroin and alcohol,'  according to authorities.
The British Columbia Coroners Service revealed the autopsy results on Tuesday.
It follows claims the star led a 'double life' as a hard-worker when in Los Angeles, and a substance-abuser whenever he would return to his native Canada.

'Double life': Cory Monteith allegedly lived a dual existence as a hard-working actor in Los Angeles and a substance abuser in Vancouver, Canada, pictured in 2009

The BC Coroners Service added that the investigation into his death is continuing, and that no further details were available at this time.
It was noted that at this stage there is still no evidence to suggest that Mr. Monteith's death was 'anything other than a tragic accident'.
Monteith, who checked into rehab in March, managed to stay clean while on the Glee set, but his resolve to stay sober weakened whenever he visited Vancouver, a source told TMZ.
According to sources, Monteith's girlfriend and Glee costar Lea Michele, along with the rest of the hit television show's cast, were aware of his addiction problems and worked hard to keep him clean and sober.

Monteith allegedly never showed up for work under the influence of drugs or alcohol and abstained from these substances 'most of the time.'

But his life in Canada painted a different picture.

A friend in need: Monteith's Glee costars were allegedly aware of his substance abuse issues and worked hard to make sure he stayed sober, pictured together in 2011 in Westwood, California

Monteith allegedly returned to his hometown of Vancouver often, and surrounded himself with friends who fueled his addiction.

Drugs and alcohol were reportedly 'always involved.'

Monteith's family is said to have been aware that he reverted back to his hard-partying ways in the North American city, but they were unable to help.
His family members reportedly became 'alarmed' recently at his behaviour and tried to come to his aid, but he grew 'distant.'

Surrounded by temptation: Monteith (R) allegedly returned to his hard-partying ways in his native Vancouver, pictured with beer in the city earlier this month

But another website claims Monteith attended a number of Alcoholic Anonymous meetings shortly before he died.

A source close to the actor told gossip website RadarOnline.com: 'Cory went to AA meetings when he got to Vancouver with some friends of his and mine. They have attended AA meetings in the past together.

'Vancouver is a great place to keep grounded when you are in the spotlight and trying to be sober.'

'Being grounded is the key to sobriety and that's what Vancouver can offer Cory. It is casual and he calls it home and he has friends here who have known him for a long time.'

The insider also insisted that despite being spotted out with friends at the Portside bar in the hours before his death, Cory was not drinking.

Tragic end: Monteith was found dead in his hotel room at the Fairmont Pacific Rim Hotel in Vancouver on Saturday night

Police: Officers entering the Fairmont Pacific Rim Hotel on Saturday July 13 where Canadian actor Cory was found dead in his room earlier that day

Monteith was found dead in his hotel room at the Fairmont Pacific Rim Hotel in Vancouver on Saturday night.

With the autopsy into his death now underway the British Columbia Coroners Service says toxicology results will not be known for several more days.

However, Sgt Randy Fincham said there was nothing to indicate Monteith's death was due to illicit drug use.

Challenge ahead: Glee producers are allegedly in meetings to discuss how to move forward without Monteith's character Finn Hudson

Meanwhile, FOX officials said it is too soon to say how Monteith's death will be handled on Glee.

According to FOX news, producers are scheduling meetings to discuss how to move forward without his character, Finn Hudson.

Industry experts predict Monteith's death will have a serious effect on the hit show, which was scheduled to start shooting next month.