Italian authorities have put 56 people under criminal probe for a series of crimes including conspiracy, extortion, kidnapping, bribery and possession of weapons.
Australian police warn of an operation to contain some 51 Italian crime clans that it says are "washing billions of dollars a year through the Australian economy" while flooding the country with illicit drugs.
The seizure of 4.3 tonnes of cocaine came at the end of an international investigation that resulted in arrest warrants being issued for 38 people in six countries.
The 'Ndrangheta have surpassed Sicily's famous Cosa Nostra to become the most powerful organised crime group in Italy and one of the largest in the world.
Fifty people were put under criminal investigation, with 13 arrests and 35 house arrests for the Ndrangheta mafia scam in Italy's poorest region, Calabria.
Prosecutors seek to prove a web of crimes dating back to 1990s, both bloody and white-collar, including murder, drug-trafficking, extortion, money-laundering, and abuse of office.
Kuciak had written about his alleged murderer on several occasions, accusing him of exploiting his connections to the police to carry out corrupt dealings.
The 28-year-old journalist and his fiancee were shot dead at their home on February 21 last year, sparking protests and leading to the resignation of former prime minister Robert Fico.
Several mayors believe that the far-right minister Matteo Salvini's decree is harsh and at odds with their migrant-friendly practices, which helped them improve the economies of their towns and neighbourhoods in the last two decades.
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