The Mafia was once endemic to southern Italy. Here, Italian policemen escort Camorra boss Antonio Iovine (C) as they leave the police headquarters in Naples November 17, 2010. Reuters

A café in Rome just steps from the Prime Minister's office was raided by police Tuesday.

Antico Caffe Chigi, which was frequented by politicians and journalists, is allegedly under the control of the Gallico crime organization, a subset of the Calabrese mafia known as the 'Ndrangheta.

According to a Financial Times report, the two-story café was one of 18 places seized by police in and around Rome. The police have purportedly captured 20 million euros in mafia assets.

The Italian mafia is generally concentrated in the south of the country, where they went relatively untouched by authorities for years. The raid, which followed an arrest last week of the Corleone family boss in Sicily, is a further sign that Silvio Berlusconi's government is cracking down on ingrained organized crime in Italy.

Over the past three years, the Italian state police force known as the Caribineri have arrested more than 8,000 suspected Mafiosi.