The Sûreté du Québec (SQ) is investigating the death of a man in his 60s at Oka Beach on Friday.
SQ spokersperson Louis-Philippe Bibeau said emergency services arrived at the beach at 3:30 p.m.
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According to Bibeau, it was other beachgoers who found the unconscious man in the water and pulled him ashore.
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He was then rushed to hospital, where he later died.
Bibeau said preliminary reports indicate the man may have fallen from a boat.
An autopsy will be performed to help determine the cause of death.