YAPHANK, N.Y. (CBSNewYork/AP) — Police on Long Island are investigating the death of a high school senior who they say fell asleep after a night of drinking and never woke up.

Detective Lt. Gerard Pelkofsky says Matthew Yuhas was drinking alcohol with friends at a neighbor’s house in East Moriches Saturday night. He says he fell asleep at some point and was discovered unresponsive late Sunday morning.

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The Suffolk County medical examiner pronounced him dead at 12:20 p.m. Sunday. An autopsy and toxicology tests were planned to determine the cause of death.

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Pelkofsky says police weren’t prepared to say whether alcohol was the reason he died.

Yuhas attended Eastport-South Manor Senior High School. A memorial service was held for him on Monday.

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