CHICAGO (CBS) — A man is dead after drowning in Lake Michigan offshore from Rogers Park early Sunday.

Divers, police Marine Unit members, and a helicopter, were called around 7:30 a.m. to Tobey Prinz Beach Park, on the lake at the mouth of Pratt Boulevard, after a man in his 30s went underwater a few blocks north on the lake at Greenleaf Avenue and never resurfaced.

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First responders did not locate the body until responding to a second distress call a few hours later.

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In that second call, two people were having trouble in the water, but made it to the pier and were able to get to shore safely.

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The Chicago Park District issued a swim advisory Sunday because of rough conditions.

CBS 2 Chicago Staff