A new unit at the European Union's police agency Europol will start fighting Islamic State group propaganda and recruiters in cyberspace next month in a crackdown on the terror network's sophisticated use of social media.

Europol Director Rob Wainwright told The Associated Press on Monday the new unit will start July 3 with some 15 experts working with social media companies to take down accounts run by IS.

EU justice ministers called for the creation of the unit in March in response to the growing number of people recruited and groomed by IS online.

Europol estimates that 4,000-5,000 European citizens have traveled to Syria and Iraq to join the militant group.

Wainwright says the team will include Arabic speakers and experts with years of experience monitoring Islamic extremist websites.