Zuckerberg apologies for Facebook mistakes with user data, vows curbs

FILE PHOTO: Facebook Founder and CEO Mark Zuckerberg speaks on stage during the annual Facebook F8 developers conference in San Jose, California, U.S., April 18, 2017. REUTERS/Stephen Lam/File Photo

SAN FRANCISCO (Reuters) - Facebook Inc Chief Executive Mark Zuckerberg apologised on Wednesday for mistakes his company made in how it handled data belonging to 50 million of its users, and promised tougher steps to restrict developers' access to such information.

The world's largest social media network is facing growing government scrutiny in Europe and the United States. This follows allegations by a whistleblower that British political consultancy Cambridge Analytica improperly accessed users' information to build profiles on American voters that were later used to help elect U.S. President Donald Trump in 2016.