NEW YORK: Chief Executive of the Facebook Inc. Mark Zuckerbergplans to testify before the US Congress as he bows to pressure from lawmakers insisting him to explain how 50 million users' data ended up in the hands of a political consultancy.
Lawmakers in the United States and Europe are demanding to know more about the company's privacy practices after a whistleblower said consultancy Cambridge Analytica improperly accessed data to target US and British voters in close-run elections.

Facebook said the company had received invitations to testify before Congress and that they were talking to legislators.Facebook shares closed down 4.9 percent on Tuesday and have fallen almost 18 percent since March 16, when Facebook first acknowledged that user data had been improperly channeled to Cambridge Analytica, which was hired by Donal Trump’s 2016 presidential campaign.

The tech sector is down 5.2 percent for March and on track for its worst month since April 2016. The data breach has raised investor concerns that any failure by big tech companies to protect privacy could deter advertisers and lead to tougher regulation.

House Energy and Commerce Committee spokeswoman Elena Hernandez said, "The committee is continuing to work with Facebook to determine a day and time for Mr. Zuckerberg to testify".On the same day, Zuckerberg turned down British lawmakers' invitations to explain to a British parliamentary committee what went wrong