(CNN) Roger Stone appeared on the InfoWars radio show the same day he sent an email claiming he dined with WikiLeaks founder Julian Assange -- and he predicted "devastating" upcoming disclosures about the Clinton Foundation.

Stone's comments in his August 4, 2016, appearance are the earliest known time he claimed to know of forthcoming WikiLeaks documents. A CNN KFile timeline shows that on August 10, 2016, Stone claimed to have "actually communicated with Julian Assange."

The comments also raise more questions about what Stone knew about WikiLeaks and about the veracity of his claims to have been in contact with Assange, which he now denies.

On the August 4, 2016, InfoWars show, Stone described the soon-to-appear WikiLeaks disclosures. He also mentioned that he spoke with then-Republican nominee Donald Trump on August 3 -- the day before the interview. InfoWars is a fringe media outlet run by Alex Jones, who is known for spreading conspiracy theories.

Stone wrote to former Trump adviser Sam Nunberg on August 4, 2016, that he had dinner with Assange the night before, according to a source familiar with the email exchange. The email was first reported by the Wall Street Journal on Monday. The Journal also reported that special counsel Robert Mueller is examining the exchange.

Stone has said the email about the dinner was sent in jest and that he has never met or spoken with Assange.

Stone further discussed the dinner with Nunberg over the phone, this source said. In that conversation, Stone told Nunberg that forthcoming leaks would be about the Clinton Foundation.

In the interview with Jones on InfoWars, Stone said that he believed Assange had proof of wrongdoing at the Clinton Foundation.

"The Clinton campaign narrative that the Russians favor Donald Trump and the Russians are leaking this information, this is inoculation because as you said earlier, they know what is coming and it is devastating," Stone said in the InfoWars interview. "Let's remember that their defense to all the Clinton Foundation scandals is not that 'we didn't do,' but 'you have no proof, yes but you have no proof.'"

"I think Julian Assange has that proof and I think he is going to furnish it for the American people," Stone said.

In an email to CNN, Stone again denied meeting with Assange.

"Airline and credit card records establish that I flew on Jet Blue from NY to LA on August 1 and returned from LA to Miami on August 3. Credit card records show I stayed at the London hotel in West Hollywood on August 1st and 2nd. My passport shows I never left the country in 2016- never mind traveling to London. Even I have not perfected the ability to be two places at once," he wrote.

Stone's statement matches what he said in the InfoWars interview in August 2016. He told Jones that had flown from Los Angeles to Miami that night.