Investigators seized prized olive groves worth €20m (£15.9m) linked to fugitive mob boss Matteo Messina Denaro.
Denaro, 52, is the head of the notorious Cosa Nostra crime family.
He has been on the run for 20 years after he was behind bomb attacks that killed 10 people in Rome, Florence and Milan in 1993.
Now cops believe they are close to finally catching the mobster, known by his nickname ‘Diabolik’.
It comes after Denaro’s vast windfarm empire was also shut down last year.
Giancarlo Trotta, provincial commander of Palermo’s financial police, said: “Seizing assets remains the main way to fight the Mafia.
“We do this by using all the expertise we’ve gained in recent years.”
Police wire taps uncovered evidence the mobster was being funded by profits from the Fountain of Gold olive oil business in Trapani, Sicily.
The company is owned by two brothers but prosecutors found a link to Denaro’s jailed right-hand man Françesco Luppino, according to the Italian media.
They are now hoping the Foutain of Gold seizure will help squeeze the gangster out of hiding as his financial empire crumbles.Italian police close to capturing Sicilian mafia's 'Boss of Bosses' after closing down his olive oil business,