110 emails in 52 email chains were determined to include classified information at the time they were received. Within those emails, eight chains contained information that was "top secret" at the time they were sent, 36 had "secret" information and eight more had "confidential" information, the FBI director said.
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Addressing emails which were either not provided to the FBI or were deleted before making it to investigators, Comey said there was no evidence of a cover-up.
Comey also said the FBI assessed that there was no direct evidence that Clinton's personal email domain was hacked. It is possible, however, that hostile actors gained access to her personal email account, he added.
"Although there is evidence of potential violations regarding the handling of classified information, our judgment is that no reasonable prosecutor would bring such a case," he said.
https://www.cnbc.com/2016/07/05/fbi-director-james-comey-has-concluded-the-investigation-into-clintons-emails.html