WikiLeaks hit back at CIA Director Mike Pompeo on Thursday after he criticized the website.

Pompeo called WikiLeaks a "non-state hostile intelligence service" that had done "great harm to our nation’s national security."

The site hit back by posting one of Pompeo's now-deleted tweets from 2016 citing the group's work publishing leaked documents from the Democratic National Committee.

"Need further proof that the fix was in from Pres. Obama on down? BUSTED: 19,252 Emails from DNC Leaked by Wikileaks," Pompeo had tweeted.

WikiLeaks shared an image of that tweet, adding:"Tweet sent by CIA Director Mike Pompeo on 24 July 2016."

Tweet sent by CIA Director Mike Pompeo on 24 July 2016 https://t.co/sTMHw2nvOG pic.twitter.com/Qd0mYRl5QF — WikiLeaks (@wikileaks) April 13, 2017

At an event earlier in the day at the Center for Strategic and International Studies, Pompeo critiqued WikiLeaks, comparing the site's head, Julian Assange, to the Wizard of Oz, an unimportant man pulling levers from behind a curtain.

Pompeo, recently a House lawmaker from Kansas, went on to joke that people from his home state had experience dealing with such characters.

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WikiLeaks has been publishing a series of documents it says were taken from a secure CIA server. Though experts agree the documents do not provide the explosive material that Assange has claimed, the leaks have been a black eye for the agency.

The leaks have focused on the CIA's hacking operations, but no leaks so far have shown any evidence that intelligence officials acted improperly. Many of the tools referenced in the program can only be used in targeted operations — unlike the bulk surveillance used by the National Security Agency.

"We are not tapping anyone's phones in my hometown of Wichita," said Pompeo at the event.