(ANSA) - Naples, June 26 - Italian police on Wednesday executed 100 arrest warrants across Italy in connection with the activities of three Naples-based Camorra mafia clans.

Members of the Contini, Mallardo and Licciardi clans were hit by what police called an "imposing" operation.

The so-called Secondigliano Alliance between the clans was hit, police said.

A "huge" amount of assets was seized too, police said.

Police said the "social office" of the organisation was in Naples' San Giovanni Bosco Hospital, where the gang controlled everything from job hirings to building contracts to trade union relations.

"The hospital had become the logistical base for criminal plots, such as insurance fraud using fake medical certificates," said Naples Chief Prosecutor Giovanni Melillo.

