Twitter Inc. is facing a wide-ranging investigation into its compliance with the EU’s strict data protection law, the Irish privacy regulator told Bloomberg Law.

The investigation into Twitter’s broad compliance with the General Data Protection Regulation opened “following receipt of a number of breach notifications from the company” since the GDPR took effect May 25, Graham X. Doyle, head of communications for the Irish Data Protection Commission, told Bloomberg Law.

Doyle said the investigation began last month and isn’t limited to Twitter’s recent privacy incident.

Twitter came under fire after it notified users that it became aware of and fixed an issue related to one of its support forms, and that the IP addresses used to make the inquiries related to the issue may have had ties to state-sponsored actors in China and Saudi Arabia.

The probe comes days after the Irish Data Protection Authority launched a broad investigation into Facebook Inc.'s compliance with the GDPR. Companies found in violation of the regulation can face fines of up to 4 percent of worldwide revenue.

Ireland is the lead investigator because Twitter’s EU headquarters is based in Dublin.

Twitter didn’t immediately respond to Bloomberg Law’s email request for comment.