The FBI is investigating hundreds of suspected members of a “nihilistic violent extremist” criminal network known for targeting children, the agency revealed Friday. 

The department is investigating over 350 subjects tied to the “loosely organized” 764 network, which centers on sexually exploiting and abusing minors online, the agency shared in a statement to the Washington Examiner. Children targeted by the network and similar organizations are often blackmailed after sending predators sexually explicit media on social media platforms such as Instagram, resulting, at times, in the young people committing suicide.