Châteauguay police have opened an investigation after a 4-year-old boy drowned in a backyard pool in a residential section of Beauharnois on Thursday evening.

Police said Friday first responders received a report of child in cardiac arrest around 8:30 p.m. The child was found in an above-ground pool behind a residence.

Attempts onsite to resuscitate the child failed and he was taken to hospital, where he was declared dead.

The child’s death is also being investigated by the Quebec coroner’s office.

The town said in a post on Facebook it was “profoundly saddened” by the news and expressed “our most sincere thoughts to the young boy, his family, the neighbourhood and also to our precious first responder colleagues.”

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