White House officials provided special counsel Robert Mueller with more than 20,000 pages of documents as they sought to cooperate with his probe of alleged Russian collusion — including nearly 8,000 documents related to the removal last year of FBI Director James Comey.

President Trump's legal team reviewed more than 100,000 pages of documents to identify which were of interest to Mueller, according to John Dowd, one of the president's personal lawyers.

"All credit goes to the president for directing and blessing this extraordinary cooperation and to Ty Cobb for finding and delivering the documents and witnesses expeditiously to facilitate the inquiry by the [office of the special counsel]," Dowd said in a statement provided to the Washington Examiner. Cobb, the president's personal lawyer inside the West Wing, has encouraged the White House to work with Mueller as much as possible.

The number of pages related to the firing of Comey — which has come under scrutiny since the former FBI director claimed Trump asked him to lay off the bureau's investigation of former national security adviser Michael Flynn — underscores the interest with which investigators have looked at the events surrounding Comey's removal.

Critics have said the incident could constitute obstruction of justice if Trump removed his FBI director in order to restrict the Russia investigation, although the White House has said Comey was fired for mishandling the investigation into Hillary Clinton's emails.

In addition to the 7,799 pages of Comey-related documents the White House provided Mueller, the White House handed over 5,079 pages of documents related to Flynn and his contacts with Russia, Dowd noted in a memo obtained by the Washington Examiner that outlines the extent to which Trump's legal team has cooperated with the Russia inquiry.

The memo also specified the Trump campaign has produced more than 1.4 million pages of documents for the special counsel and more than 28,000 pages of documents to congressional committees looking into Russian collusion allegations.

Trump told reporters at the White House on Wednesday he is "looking forward" to sitting down with Mueller for a formal interview. The president suggested his legal team has informed him the interview will take place in two or three weeks, and he said he would be happy to submit to the interview under oath if his lawyers allowed him to do so.

Mueller interviewed Attorney General Jeff Sessions last week, the Justice Department said on Tuesday.

Dowd noted more than 20 White House officials have voluntarily provided interviews to Mueller — including eight from the White House counsel's office — and noted 17 additional former campaign aides as well as 11 other people affiliated with the campaign have given interview to the special counsel or congressional investigators.