Mark Zuckerberg has finally broken his silence on the Cambridge Analytica data scandal that has battered Facebook's shares and drawn scrutiny from regulators and lawmakers around the world.

Mr. Zuckerberg, the company's founder and chief executive, had been conspicuously silent after the revelations, FT wrote.

Read alsoCambridge Analytica expose: key revelations of investigative journalists"We have a responsibility to protect your data, and if we can't then we don't deserve to serve you. I've been working to understand exactly what happened and how to make sure this doesn't happen again. The good news is that the most important actions to prevent this from happening again today we have already taken years ago. But we also made mistakes, there's more to do, and we need to step up and do it," he said in a Facebook post on Wednesday afternoon:

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Shares in Facebook were up 1% after the statement, having been as much as 2.9% lower this morning.