The remarks are expected to be "substantial," The New York Times and The Washington Post reported, each citing a source.

The former FBI director will speak at 11 a.m. ET at the Department of Justice and will not take questions. The statement will be streamed live.

Special counsel Robert Mueller will break his silence Wednesday about his 22-month investigation into the 2016 Trump campaign and Russian interference in the election.

The event comes less than a week after House Judiciary Committee Chairman Rep. Jerry Nadler, D-N.Y., said that Mueller wanted to testify privately to Congress about the probe. Some Democrats pushed for Mueller to testify publicly. President Donald Trump has said that Mueller should not testify.

The White House was advised Tuesday that Mueller "may make a statement," a senior administration official said.

Mueller and his team of prosecutors have been tight-lipped about their inquiry, releasing new information rarely and generally in the form of unsealed indictments. The DOJ released a partially redacted version of Mueller's 448-page report last month.

The special counsel has been privately critical of Attorney General William Barr's first public statements following the conclusion of the investigation and the resulting coverage in the media.

In March, Mueller sent Barr a letter in which he wrote that "[there] is now public confusion about critical aspects of the results of our investigation." That letter was made public in April.

Barr told lawmakers that Mueller's letter was "a bit snitty" and "probably written by one of his staff people."

The attorney general is in Alaska.

WATCH: Special counsel Robert Mueller resigns