Facebook on Notice as Vietnam Tightens Grip on Social Media

If the company doesn’t comply, it could be required to store data onshore—making it easier for authorities to hunt down dissidents

A look at documents released by a U.K. lawmaker as part of a British parliamentary committee inquiry into “disinformation and fake news,” reveals how Facebook and CEO Mark Zuckerberg gave select developers special access to user data and deliberated on whether to sell that data. (Photo: Getty Images)

Just days after Vietnam launched its latest campaign against social media with a new cybersecurity law, the communist regime accused Facebook of not taking down antigovernment comments.

The country’s Ministry of Information and Communications has complained to Facebook about pages that were critical of the communist state, the state-run Vietnam News Agency said Wednesday, adding the company hadn’t responded.

The...