At least one document obtained and published by the hacker Guccifer 2.0 during the 2016 election was edited, according to a report.

Guccifer 2.0, who claimed responsibility for hacking the Democratic National Committee’s computer servers, published its first hacked document on June 15, 2016, and said the document came from the DNC. But a former DNC official told the Associated Press the document actually came from the email inbox of John Podesta, Hillary Clinton’s campaign chairman.

Additionally, the document published by Guccifer 2.0 included the word “CONFIDENTIAL,” but the official said that word wasn’t included in the original document.

According to the Associated Press, Guccifer 2.0 added the word in an effort to draw the attention of journalists.

Guccifer 2.0 claimed to have breached the DNC last year and leaked the emails to WikiLeaks. Guccifer 2.0 also published some of the documents on his or her own.

Altogether, Guccifer 2.0, WikiLeaks, and DCLeaks, a website that was also posting stolen documents, published more than 150,000 emails they obtained from at least 12 Democrats, the Associated Press found.

Neither of the three say they are tied to Moscow, but cybersecurity experts believe Guccifer 2.0 is an agent of Russia’s military intelligence service.