Facebook has been plagued with yet another security breech, announcing that unknown attackers stole data from 50 million users, enabling the attackers to “seize control” of the accounts.

The social media platform said users don’t need to change their passwords. Facebook logged out the 50 million breached users along with another 40 million it said were vulnerable to the attack.

CEO Mark Zuckerberg told reporters in a conference call Friday that the company doesn’t know yet if any of the accounts that were hacked were misused, the Associated Press reported.

Facebook acknowledged earlier this year that the data firm Cambridge Analytica gained unauthorized access to the data of as many as 87 million users.

Along with Google, Facebook representatives met Tuesday at the Justice Department with Attorney General Jeff Sessions and two dozen state attorneys general to discuss accusations that they have intentionally stifled “the free exchange of ideas.”

The latest breach was carried out by a bug in Facebook’s “View As” feature.

The company said in a blog post that the feature lets people see how their profiles appear to others.

“We haven’t yet been able to determine if there was specific targeting” of particular accounts, said Guy Rosen, Facebook’s vice president of product management.

Rosen told reporters the breach “does seem broad.”

“And we don’t yet know who was behind these attacks and where they might be based.”

Jake Williams, a security expert at Rendition Infosec, told the AP that the bigger concern is whether third party applications were impacted.

In 2013, attackers compromised 3 billion Yahoo accounts, stealing names, email addresses, phone numbers, birthdates and security questions and answers.

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