Democratic National Committee chief Donna Brazile leaked an email in January from the Bernie Sanders campaign revealing his African-American outreach team planned to host a Twitter-related event.

Brazile, who was vice chairwoman of the DNC at the time, forwarded an email obtained from the Sanders team to the Hillary Clinton campaign, which was announcing ‘Twitterstorm Tuesday’.

Donna Brazile was Clinton mole who tipped off Clinton campaign about Sanders planned Twitter storm #PodestaEmails2https://t.co/8O5nb2h7Aspic.twitter.com/adVKlicZh9 — WikiLeaks (@wikileaks) October 10, 2016

In response to the action, Adrienne Elrod, a Clinton campaign aide, said, “FYI. Thank you for the heads up on this Donna.”

The latest revelations emerged after Wikileaks released the second bulk of their emails from Clinton campaign chair John Podesta on Monday.

The first batch from Friday included excerpts from Clinton’s Wall Street transcripts while Wikileaks dropped the third bulk on Tuesday.

READ MORE: Wikileaks release Part 3 of Podesta emails

Brazile replaced Debbie Wasserman Schultz on an interim basis as chairwoman of the DNC on the eve of the party’s national convention, following a series of leaked emails showing that officials had planned to harm Sanders’ bid for the Democratic nomination.

The purge: Senior DNC staff resigns after email revelationshttps://t.co/w0Wva6rKzspic.twitter.com/f454FZobLL — RT America (@RT_America) August 2, 2016

Taking to Twitter, Brazile defended her actions and said there are “plenty of emails from me to both team Clinton and Sanders.”

For what it's worth, let me tell you what I know: there's plenty of emails from me to both team Clinton & Sanders. And lots of transcripts. — Donna Brazile (@donnabrazile) October 10, 2016

As a political activist, I donated to all the Dems running for President. And I sought and shared advice to all campaigns. Emails too. — Donna Brazile (@donnabrazile) October 10, 2016

She also accused the Observer of “working overtime for Donald Trump and his Russian hackers.”