https://motherboard.vice.com/en_us/article/d3qejz/facebook-hack-13-million-victims-search-history

Two weeks after saying hackers had accessed the personal information of around 50 million Facebook users, the social network said that, actually, the victims were around 30 million people.

But the data the hackers accessed, it appears, was more sensitive than initially thought. Some of the data stolen included check-in locations and the users’ previous 15 searches on the site.