Meta Platforms Inc. was hit with a €798 million ($841 million) fine by European Union regulators by tying its Facebook Marketplace service to the social network, the US tech giant’s first ever penalty for EU antitrust violations.

The European Commission fined the company over allegations that it tied its classified-ads platform to its flagship social network.

Launched in 2016, Facebook Marketplace enables users of Meta’s flagship social network to buy and sell goods. The European Commission, the EU’s executive arm, launched a probe into the service in 2021 over concerns it may harm competition. Today’s fine is the culmination of that probe.