Mark Zuckerberg shakes hands with European Parliament President Antonio Tajani

Photo by Xinhua/Sipa USA

Mark Zuckerberg tells European Parliament, 'I'm sorry.'

May 23, 2018 - 11:50 am

(CNN) -- Mark Zuckerberg is taking his Facebook apology tour to Europe this week. 

The Facebook founder and CEO testified at a European Parliament meeting Tuesday.

Zuckerberg said that he is sorry for how Facebook was used to spread fake news and misinformation campaigns.

He admitted he has not done enough to protect European users' data.

"But it's also become clear that the last couple of years that we haven't done enough to prevent these tools from being used for harm as well. And that goes for fake news, foreign interference in elections, and developers misusing peoples' information. We didn't take a broad enough view of our responsibility. And that was a mistake. And I'm sorry for it," Zuckerberg said.

His visit came in the wake of the Cambridge Analytica scandal.

The data firm reportedly accessed information from about 50 million Facebook users worldwide without their knowledge. 

Zuckerberg said Tuesday he is committed to keep Facebook users safe, and will make changes to the platform to ensure that happens.

He made similar apologies and promises to Congress in April.

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