The European Union's top prosecutor says she has been told that smugglers' boats bringing migrants across the Mediterranean to Europe also are carrying terrorist fighters from the Islamic State group.

Michele Coninsx, head of the EU's judicial cooperation agency Eurojust, told reporters Monday she received the information as part of Eurojust's efforts to help EU nations jointly respond to illegal immigration, terrorism and cybercrime.

Coninsx said Eurojust's coordination efforts are ongoing and she couldn't divulge what EU nations have told the agency.

She told The Associated Press it isn't yet clear what problem the reported infiltration of Islamic militants may pose for European law enforcement. But she said also groups like Islamic State are also using proceeds from people trafficking to fund terrorism.