"Our email publication servers are under a targeted DoS attack since releasing #DNCLeak2," WikiLeaks said in a Twitter post.

​On Monday, WikiLeaks released 8,263 emails belonging to the members of the Democratic National Committee (DNC).

Earlier, presidential nominee Hillary Clinton`s campaign said the leaked document WikiLeaks planned to release in the coming two days were "probably a fake."

"Friends, please remember that if you see a whopper of a Wikileaks in the next two days — it`s probably a fake," member of Clinton’s electoral office Jennifer Palmieri said in a Twitter post.

​In turn, WikiLeaks responded on Twitter that the "biggest whoppers" are those told during Hillary Clinton’s campaign.

The Monday email dump is not the first one, as on July 22, the whistleblowers published 19,252 emails and 8,034 attachments from key figures in the DNC.

The leak showed that the Democratic Party`s top officials deliberately worked to obstruct Democratic presidential hopeful Bernie Sanders` campaign to favor Hillary Clinton`s nomination bid.

WikiLeaks has also released thousands of emails from the hacked account of Clinton’s campaign chairman John Podesta.

On July 22, the whistleblowers published the first part of the leaked emails from key figures in the DNC, such as Communications Director Luis Miranda, National Finance Director Jordon Kaplan and Finance Chief of Staff Scott Comer. The release showed that the Democratic Party`s top officials deliberately worked to obstruct Democratic presidential hopeful Bernie Sanders` campaign to favor Hillary Clinton`s nomination bid.

In August, the website`s founder, Julian Assange, pledged to release "significant" documents sent to or by Clinton`s entourage before the presidential elections are held in the United States in November.

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