A link to the documents was posted on WikiLeaks' Twitter account and attributed to alleged hacker Guccifer 2.0, according to Reuters. The release came during a presentation on Tuesday from a person speaking on behalf of Guccifer 2.0 at a London cyber security conference, Politico reported.
Reuters could not immediately access the documents.
Read alsoReuters: Trump says Putin better leader than Obama"There's one person who stands to benefit from these criminal acts, and that's (Republican presidential nominee) Donald Trump," DNC interim Chair Donna Brazile said in a statement, according to the report.
"Not only has Trump embraced (Russian President Vladimir) Putin, he publicly encouraged further Russian espionage to help his campaign," she said.
Trump in July invited Russia to dig up emails from Clinton's time as secretary of state, prompting Democrats to accuse him of urging foreigners to spy on Americans. He later said he was speaking sarcastically.
Read alsoBloomberg: Clinton says possible Russian meddling a serious concernThe Trump campaign did not immediately respond to a request for comment, according to Reuters.
Democratic Party sources said the party and Clinton's presidential campaign were deeply concerned about possible publication by WikiLeaks or other hackers of a new torrent of potentially embarrassing party information ahead of the November 8 election.
