Senate Minority Leader Chuck Schumer of N.Y., right, walks with Sen. Dianne Feinstein, D-Calif., vice chair of the Senate Intelligence Committee, on Capitol Hill in Washington, Friday, Feb. 17, 2017, following a closed-door intelligence briefing by FBI Director James Comey. (AP Photo/J. Scott Applewhite)

Senate Minority Leader Chuck Schumer of N.Y., right, walks with Sen. Dianne Feinstein, D-Calif., vice chair of the Senate Intelligence Committee, on Capitol Hill in Washington, Friday, Feb. 17, 2017, following a closed-door intelligence briefing by FBI Director James Comey. (AP Photo/J. Scott Applewhite)

WASHINGTON (AP) — The Senate intelligence committee has sent formal requests to more than a dozen organizations, agencies and individuals, asking them to preserve all materials related to a probe the panel is conducting on Russian interference in the 2016 election and related issues, a congressional aide said Saturday.

The committee chairman, Sen. Richard Burr, R-N.C., and its vice chairman, Sen. Mark Warner, D-Va., sent letters out on Friday — the same day committee members received a classified briefing from FBI Director James Comey. Committee members declined to comment on what was discussed after the more than hourlong briefing.

The aide was not authorized to discuss the issue and spoke only on condition of anonymity

ADVERTISEMENT

On Thursday, Senate Democrats wrote the White House and law enforcement agencies seeking assurances that they were preserving all materials related to contacts individuals associated with President Donald Trump had with Russians.

Those letters asked for confirmation that the White House, FBI and Justice Department had instructed their employees to preserve all materials related to any contacts Trump’s administration, campaign, transition team — or anyone acting on their behalf — have had with Russian government officials or its associates.

The letter to the White House counsel said the executive branch and Congress have been investigating Russia’s efforts to interfere with the 2016 election. As a part of these investigations, there have been ongoing inquiries into communications or contacts between the Trump campaign or Trump transition team and associates or officials of the Russian government, including communications involving ousted national security adviser Mike Flynn.

ADVERTISEMENT

Congressional staffers have said that they are not aware of any evidence that materials are not being preserved, but Senate Democratic leader Chuck Schumer of New York said Thursday on the Senate floor: “There is real concern that some in the administration may try to cover up its ties to Russia by deleting emails, texts and other records that could shine a light on those connections. These records are likely to be the subject of executive branch as well as congressional investigations and must be preserved.”