Highly classified Hillary Clinton emails that the intelligence community and State Department recently deemed too damaging to national security to release contain “operational intelligence” – and their presence on the unsecure, personal email system jeopardized “sources, methods and lives,” a U.S. government official who has reviewed the documents told Fox News.

The official, who was not authorized to speak on the record and was limited in discussing the contents because of their highly classified nature, was referring to the 22 “TOP SECRET” emails that the State Department announced Friday it could not release in any form, even with entire sections redacted.

Read the article “Official: Withheld Clinton Emails Contain ‘Operational’ Intel, Put Lives at Risk” on foxnews.com.