The European Union is calling on Facebook CEO Mark Zuckerberg to testify at the legislature of the 28-nation bloc about the widening data privacy scandal at his company.

EU Justice Commissioner Vera Jourova had a phone exchange with Facebook COO Sheryl Sandberg and said on Friday that Zuckerberg should act on the Parliament’s invitation to come explain the situation.

Last week, Facebook acknowledged that up to 2.7 million people in the EU may have been victim of improper data sharing involving political consultancy firm Cambridge Analytica.

On Friday, Jourova said that Facebook was “working on an audit of other possibly dangerous apps now.”

Zuckerberg this week testified before the U.S. Congress about the scandal.

(AP)