Europeans risk seeing social media services Facebook and Instagram shut down this summer, as Ireland’s privacy regulator doubled down on its order to stop the firm’s data flows to the United States.

The Irish Data Protection Commission on Thursday informed its counterparts in Europe that it will block Facebook-owner Meta from sending user data from Europe to the U.S. The Irish regulator’s draft decision cracks down on Meta’s last legal resort to transfer large chunks of data to the U.S., after years of fierce court battles between the U.S. tech giant and European privacy activists.

The European Court of Justice in 2020 annulled an EU-U.S. data flows pact called Privacy Shield because of fears over U.S. surveillance practices. In its ruling, it also made it harder to use another legal tool that Meta and many other U.S. firms use to transfer personal data to the U.S., called standard contractual clauses (SCCs). This week’s decision out of Ireland means Facebook is forced to stop relying on SCCs too.