(Reuters) FBI Director James Comey was driven in part by a fear of leaks from within his agency when he decided to tell Congress the FBI was investigating newly discovered emails related to Hillary Clinton, law enforcement sources said on Thursday.

The examination of the email traffic is now being carried out under the tightest secrecy by a team at Federal Bureau of Investigations headquarters in Washington, the sources said, requesting anonymity because of the inquiry’s sensitivity.

Several sources said it was unclear whether the FBI would make any further public disclosures about its latest review before Tuesday’s presidential and congressional elections. Two sources said such disclosures were unlikely.

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