The European Commission has launched an investigation into Google after other search engines complained that the firm had abused its dominant position.
The body said it would look into whether the world's largest search engine lowered the ranking of competing services in its results.
The probe follows complaints by British price comparison site Foundem and French legal search engine ejustice.fr.
Google said it would work with the Commission to "address any concerns".
Earlier this year the attorney general of Texas launched a similar investigation following complaints from firms including Foundem. BBC News
