Rejecting a request for the FBI’s files on #Gamergate and its affiliates, the bureau stated that, while they have responsive documents related to the loose coalition, those files are part of an ongoing investigation, and release “would interfere with law enforcement proceedings.” Who or what is being investigated remains an open question.
The response letter is a standard form letter from the FBI, generally used anytime there is a related open investigation on the subject in question.
The records responsive to your request are law enforcement records; there is a pending or prospective law enforcement proceeding relevant to these responsive records, and release of the information in these responsive records could reasonably be expected to interfere with law enforcement proceedings. For a further explanation of this exemption, see the enclosed Explanation of Exemptions.
The FBI’s full response:
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