Google faces nine anti-trust complaints which EU regulators are investigating, two sources said yesterday as rivals ramped up the pressure on the world leading search engine.

The European Commission has up to now confirmed four cases against Google. The addition of fresh complaints could broaden the EU watchdog’s ongoing investigation and pile pressure on the company to strike a settlement.

“The commission has nine formal complaints now. The new complaints come from small companies,” said one source who declined to provide details because of the sensitivity of the matter. The second source said three cases came from national regulators while two were fresh complaints.

The commission said it had nothing to add. Google could not be reached for comment.