The Italian Mafia is trading guns for narcotics with Muslim terrorists according to Roberto Saviano who wrote the international bestseller Gomorrah which exposed the Camorra or Neapolitan Mafia to the world as reported by ANSA:
The mafias "are capable of understanding and relating to economic flows and to speculate on them," the writer told Sky TG24 news channel. "The mediations for arms or drug deals never involve the Islamist or the militant directly, but take place via sub-Saharan, Maghrebin or Middle Eastern elements that deal solely with drug trafficking," he explained.
Saviano also said Belgium has become the financial capital for Muslim terrorists due to the lax defenses in its financial system.
Further reading that may be of interest: