Facebook Inc said on Wednesday that the personal information of up to 87 million users may have been improperly shared with political consultancy Cambridge Analytica, up from a previous news media estimate of more than 50 million.
Most of the 87 million people whose data was shared with Cambridge Analytica, which worked on U.S. President Donald Trump's 2016 campaign, were in the United States, Facebook Chief Technology Officer Mike Schroepfer wrote in a blog post.