Zuckerberg has been invited to testify by no fewer than three congressional committees in the wake of reports that research firm Cambridge Analytica improperly gained access to the personal data of more than 50 million Facebook users.
On Monday Senate Judiciary Chairman Chuck Grassley called on Zuckerberg to testify alongside Google CEO Sundar Pichai and Twitter CEO Jack Dorsey at a hearing on data privacy to be held April 10.
Bloomberg reported Tuesday Zuckerberg will testify before the House Energy and Commerce Committee on April 12.
"Reports of Mr. Zuckerberg's confirmed attendance are incorrect," committee spokesperson Elena Hernandez told NBC News. "The committee is continuing to work with Facebook to determine a day and time for Mr. Zuckerberg to testify."
The CEO declined to testify before UK lawmakers Tuesday. Instead the company will send a top deputy to answer questions.
Facebook is facing questions from both sides of the Atlantic after the alleged leak. The Federal Trade Commission on Monday issued a rare confirmation that it was investigating whether the social media company had violated a consent decree it signed with the agency in 2011.
The company's stock has taken a beating since the leak was first reported.
A Facebook spokesperson declined to confirm that Zuckerberg would testify.
Read the full CNN report.