Italian and U.S. police have launched a coordinated crackdown on a Sicilian Mafia family that was seeking to rebuild its power base after years of exile in the United States, Italian investigators said on Wednesday.

More than 200 police, including officers from the U.S. Federal Bureau of Investigation (FBI), arrested 18 people in Sicily as part of their investigation into the Inzerillo clan in the island's capital Palermo and the allied New York-based Gambino family.

A 19th suspect is being sought in the United States.