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Facebook says the data of "up to 87 million" users could be affected

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Facebook is trying to amend the privacy breach  Pxhere

Facebook says the information of up to 87 million people - mostly in the US - may have been improperly shared with a data mining firm.

The increased figure comes after data mining firm, Cambridge Analytica allegedly used information obtained from over 50 million Facebook users to sway elections around the world.

On Monday, Facebook will send a notice to users who may have had their data improperly shared with the data firm.

All Facebook users will also receive a link so they can see the apps they have used and the information they've shared with those apps.

Chief Technology Officer Mike Schroepfer says the social media firm has promised to take a hard look at what information apps can access when connected to Facebook.

The announcement comes as part of a plan to restrict data access on the site.