German cartel office says Facebook abused dominant position

FRANKFURT, Dec 19 (Reuters) - Germany's cartel office has found that Facebook abused its dominant market position, in a ruling that questioned the U.S. social network's model of monetising the personal data of its 2 billion users through targeted advertising.

Presenting preliminary findings of its 20-month probe, the Federal Cartel Office said Facebook held a dominant position among social networks and had abused its power by collecting third-party data on its users. (Reporting by Douglas Busvine; Editing by Maria Sheahan)