U.S. Said to Probe How Classified Data Got on Hillary Clinton’s Server

Anybody who knowingly e-mailed classified material to Clinton or her top aides when she was secretary of state could face criminal prosecution, according to current and former U.S. national security officials.

Democratic presidential candidate and former U.S. Secretary of State Hillary Clinton delivers remarks during a campaign stop at Dr. William U. Pearson Community Center on August 18, 2015 in North Las Vegas, Nevada.
Photo by Isaac Brekken/Getty Images

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By Chris Strohm and John Walcott

August 20, 2015 at 3:41 PM UTC

Updated on

August 20, 2015 at 4:18 PM UTC

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U.S. law enforcement officials are investigating how classified material found its way into messages that members of Hillary Clinton’s State Department staff sent to her private e-mail address, according to a U.S. official with knowledge of the inquiry.

The official, who spoke on the condition of anonymity to discuss an investigation still in its early stages, said there is some indication that Clinton aides drew upon a variety of messages in classified information systems to produce summaries and updates of events in Libya and elsewhere and then sent them to Clinton or her aides using a private server.