Facebook chief operating officer Sheryl Sandberg is speaking with state attorneys general about the Cambridge Analytica data breach behind closed doors, Bloomberg reports.

Sandberg is answering new questions about the scandal through a Q&A while attending the National Association of Attorneys General meeting in Portland, Oregon, this week. A person familiar with the matter told Bloomberg the gathering provides an opportunity for Sandberg to speak with many state attorneys general at once. Sandberg previously attended the conference in 2013.  

Cambridge Analytica made headlines around the world in March when it was revealed that the political data company co-founded by President Trump's former chief strategist Steve Bannon and hedge fund billionaire Robert Mercer gathered users' Facebook data and claimed it could influence the behavior of American voters. Since then, attorneys general from several states, including New York and Missouri, have launched probes into how Facebook allows its users' data to be shared.

"We know that this was a major violation of people's trust, and I deeply regret that we didn't do enough to deal with it," Sandberg wrote in a Facebook post four days after the news broke. "We have a responsibility to protect your data--and if we can't, then we don't deserve to serve you."

Despite vowing to do a better job protecting users' data, earlier this month Facebook revealed a "technical error" made about 14 million private posts available to the public.