Italian authorities have taken a number of suspected Islamist extremists into custody, who they believe were recruiting would-be suicide bombers for Iraq and Afghanistan.
Police in Milan began executing about 20 search warrants in both Milan and Reggio Emilia.
An Italian news agency said that eleven people have been arrested in Italy and more have been arrested in other parts of Europe.
Italy’s interior minister said most of the men arrested were of Tunisian descent.
They are accused of falsifying identification documents, helping illegal immigration and helping to hide criminals accused of terrorism charges.
Police discovered Al-Qaeda manuals on how to produce explosives, detonation devices and poisons, as well as instructions on guerilla techniques.
A Department of Homeland Security official said this morning that none of the arrests in Europe involved any threats to the United States.