Google is again being investigated by the EU over its fast-growing tool for searching job listings.

While employers and job boards have applauded the service, several rival job-finding services have complained that it is anti-competitive and cost them users and profits.

More than 20 job search Web sites in Europe have called on EU regulators to temporarily order Google to stop playing unfairly while they investigate.

The rivals say Google has been engaging in illegal activity by placing its job search tool at the top of search results because of its dominance in the online market.