Google was hit with an anti-trust complaint on Monday after Danish online job-search rival Jobindex took its grievance to EU regulators, alleging the Alphabet-owned business had unfairly favoured its own job search service.

The complaint could reinvigorate EU anti-trust chief Margrethe Vestager’s scrutiny of the service, Google for Jobs. Vestager said three years ago she was looking into the issue but has yet to take any action.

The European Commission said it would assess the complaint according to the standard procedures. Jobindex’s action comes four years after German media group Axel Springer’s jobs portal Stepstone filed a similar complaint against Google.

Google, which has been fined more than €8 billion by Vestager in recent years, says it partners with job providers to direct people to websites. “Any jobs provider, big or small, is able to take part and companies are seeing increased traffic and job matches as a result of this feature,” a Google spokesman said.