Hillary Clinton continues to be dogged by questions about her use of a private e-mail account while she was secretary of state.
CBS News identified two e-mails on her server Wednesday which the intelligence community says contained classified information.
The messages were uncovered during an investigation of the 2012 attack in Benghazi, Libya, that killed U.S. Ambassador Chris Stevens and three others.
The first email, from April 2011, was forwarded to Clinton by aide Huma Abedin. It cited intelligence reports from the U.S. Africa Command on Libyan troop strength and movements.
The emails are among the some 30,000 Clinton turned over to the State Department from her private server. On Monday, the State Department said it had flagged 305 emails, out of the 20 percent it has reviewed, as potentially containing classified information.
Clinton has insisted there was no classified information on her server.