“We strongly encourage you to make use of this opportunity to correct the record and provide the Committee with sworn, truthful, and accurate responses to this request as we consider whether a referral of this matter to the Department of Justice for criminal investigation is appropriate,” the letter states, according to Reuters.

Sunday’s letter was signed by a bipartisan group of legislators and included the committee’s Democratic chairman, Jerrold Nadler, and four members of the antitrust subcommittee: Democratic Chair David Cicilline, Democratic Vice Chair Pramila Jayapal, and Republicans Ken Buck and Matt Gaetz.

The letter comes just days after a bill was introduced by Democratic Senator Amy Klobuchar and Republican Senator Chuck Grassley. It aims to prevent Big Tech platforms from requiring vendors on their sites to purchase their goods or services, or from biasing their search results to favor their own products.

“As dominant digital platforms—some of the biggest companies our world has ever seen—increasingly give preference to their own products and services, we must put policies in place to ensure small businesses and entrepreneurs still have the opportunity to succeed in the digital marketplace,” Klobuchar said in a statement.