The top senators on the Senate Intelligence Committee will meet next week Bob Mueller, the special counsel appointed to lead the investigation into Russia's involvement in the election, and any possible links to President Trump's campaign.

Sen. Mark Warner Mark Robert WarnerFBI director casts doubt on concerns over mail-in voting fraud Democrats call for declassifying election threats after briefing by Trump officials It's time to upgrade benefits MORE (D-Va.) told CNN on Thursday that "we've got it scheduled [for] next week."

Warner said he and Burr are also "in discussions" with Mueller about how to see former FBI Director James Comey's memos detailing his conversations with Trump. They have been seeking the meeting since Mueller's appointment last month.

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Comey testified on Thursday to the Intelligence Committee that he had handed over the memos to Mueller.

In addition to Mueller's investigation, the Senate Intelligence Committee and Senate Judiciary Committee are conducting their own investigations. They have stressed they want to sit down to hash out boundaries with the former FBI director to make sure they aren't interfering with his investigation.

"It will probably be next week," Burr told reporters, while noting the meetings hadn't been scheduled.

The two officials were part of an open hearing on Wednesday at which they repeatedly refused to answer questions without giving a clear explanation for why. The issue frustrated senators on the panel, and led Burr to admonish the witnesses at the hearing's conclusion.