Skokie emergency crews responded just before 6:25 p.m. to a Holiday Inn, located at 5300 W. Touhy Ave., for a reported drowning in an indoor pool, according to police.
When fire crews arrived, they performed live-saving measures on the 19-year-old, and took him to an area hospital, Skokie police said.
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The teen was later determined to be critical but stable.
It was not immediately clear what led up to the near-drowning incident, which is under investigation.
There is no indication of foul play, police said.