The Judiciary committee voted on Thursday to subpoena the two CEOs.

The executives will testify on allegations of anti-conservative bias, the committee said. The companies have come under heavy criticism from conservatives over their decision to flag two New York Post stories as spreading disinformation.

The CEOs of Facebook, Twitter and Alphabet Inc will also testify before the Senate Commerce Committee on Oct. 28 about a key law protecting internet companies.

Republican President Donald Trump and many Republican lawmakers have continued to criticize tech companies for allegedly stifling conservative voices. Both hearings are aimed at discussing the issue.

(Reporting by Richard Cowan; Editing by Chris Reese and Richard Chang)

By Richard Cowan and Nandita Bose