Washington (CNN) Prosecutors said for the first time that they have evidence of Roger Stone communicating with WikiLeaks, according to a new court filing from special counsel prosecutors.

During its investigation of the Russian hack of the Democrats, "the government obtained and executed dozens of search warrants on various accounts used to facilitate the transfer of stolen documents for release, as well as to discuss the timing and promotion of their release," the prosecutors wrote Friday to a federal judge.

"Several of those search warrants were executed on accounts that contained Stone's communications with Guccifer 2.0 and with Organization 1," which is WikiLeaks.

Previously, the prosecutors had only outlined how Stone attempted to get in touch with WikiLeaks' Julian Assange through intermediaries. Stone sought to learn about what the hackers had stolen from the Democratic Party and how he hoped for its release so it could help Donald Trump's campaign, prosecutors have said.

The new filing provided no further details on what was contained in the communications.

Read More