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.
Mexican drug cartels are distributing food and hand sanitiser as residents struggle because of the pandemic, while in Italy Mafia gangs are offering loans to the poor.
More than 200 police, including officers from the US Federal Bureau of Investigation (FBI), have been carrying out 19 arrest warrants since dawn targeting the Inzerillo clan in Sicily's capital Palermo and the New York-based Gambino family.
Kuciak had written about his alleged murderer on several occasions, accusing him of exploiting his connections to the police to carry out corrupt dealings.
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