Canadian police announced this week that a massive child pornography investigation has led to the arrests of more than 300 people across the globe. The three-year investigation, nicknamed Project Spade, has also reportedly led to the rescue of almost 400 children.

Announcing the end of Project Spade during a press conference Thursday, Toronto Police Service Chief William Blair explained that the investigation began in 2010 after undercover officers made contact with a Toronto man suspected of sharing child pornography, per the Agence France-Presse.

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