Facebook to probe 'tens of thousands' of apps - Zuckerberg

Facebook will investigate "tens of thousands" of apps to discover if any other companies have accessed data in a similar way to Cambridge Analytica (CA), Mark Zuckerberg has told US politicians.

The social network says it is in the process of letting up to 87 million users know that their information may have been accessed by CA, and in a packed room on Capitol Hill, Mr Zuckerberg repeated his admission that the company "didn't do enough" to stop its tools "being used for harm".