Rep. Adam Schiff, the ranking Democrat on the House Intelligence Committee, accused chairman Devin Nunes of modifying a controversial Republican memo that accuses the FBI and Justice Department of improperly surveilling a Trump campaign adviser during the 2016 election.

House Intel Committee Republicans voted on Monday to release that memo, despite Justice Department warnings that such a move would be “extraordinarily reckless” because of questions over its accuracy.

Schiff said in a statement on Wednesday night that Nunes made “material changes” to the version the committee sent to the White House. He asserted that committee members were not immediately made aware of the modifications and had no opportunity to compare the original memo to the modified version until Wednesday evening.