(DAILYMAIL) — Glee star Cory Monteith had spent his last hours enjoying an evening out with friends before he tragically passed away of unknown causes while alone in a hotel room.

The 31-year-old – who completed a stint in rehab in April for substance addiction and appeared to be ‘happy and healthy’ in recent months – was out in Vancouver before returning alone to his Fairmont Pacific Rim Hotel in the city.

The star had been in his luxury hotel room with friends on Saturday evening before heading out for the night. His girlfriend and Glee co-star Lea Michele is not believed to have been with him.

No cause of death has been confirmed at this point but there was said to be no implications of foul play. Medical examiners will conduct an autopsy on Monday.

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