Quebec provincial police say the accident occurred shortly after noon today near a lakeside chalet in the village of Lantier.
Police spokesman Ronald McInnis says the snowmobile was headed from the lake up to the chalet when it struck the boy as he was sliding down on a toy snowmobile.
McInnis says the boy's aunt didn't see him before it was too late.
He was rushed to a nearby hospital and died soon after.
His aunt was treated for shock.
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