https://www.reuters.com/article/us-facebook-cambridge-analytica-warrants/uk-investigators-enter-london-office-of-firm-at-center-of-facebook-data-storm-idUSKBN1GZ2ZT

Investigators from Britain's data watchdog on Friday entered the London offices of a data analytics firm at the center of a storm over allegations it improperly harvested Facebook data to target U.S. voters, a Reuters witness said.