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Adriana Sapone, Associated Press
Police officers stand outside a suspect's house during an operation conducted with U.S. FBI agents, in Sinopoli, southern Italy, early Thursday morning, May 7, 2015. Italian police said that in operations conducted with U.S. FBI agents they have dismantled a major drug trafficking ring whose base was a restaurant-pizzeria in New York City. At least 15 suspects have been detained by early Thursday, including three in the United States connected with the eatery in the city's Queens borough. Investigators say the crackdown further demonstrates that the 'ndrangheta, an organized crime syndicate rooted in Calabria in the toe of the Italian peninsula, have forged ever stronger ties with U.S.-based mobsters.

ROME — A major cocaine trafficking ring run out of a New York City pizzeria was dismantled after a trans-Atlantic probe revealed how the Italian 'ndrangheta crime syndicate has expanded its ties with New York's traditional Mafia crime families, Italian police and U.S. FBI agents said Thursday.

At least 13 people were arrested in pre-dawn raids in Calabria, the region in southern Italy that is the power base of the 'ndrangheta, which has increasingly taken advantage of the Sicilian Cosa Nostra's disarray to consolidate its influence and operations in the United States, officials said at a joint Italian-U.S. news conference in Rome.

Three other Calabrians were arrested in New York several weeks ago. All were members of the family that ran the pizzeria in the Corona neighborhood of Queens, New York's most populous borough, authorities said.

The restaurant, Cucino a Modo Mio, which means "I cook it my way," was the command center for an international trafficking operation, said Andrea Grassi, who is in charge of an Italian state police special operations unit known as SCO. Authorities said they seized more than 60 kilograms of cocaine in the Netherlands and Spain during the probe that began last year.

"In the evening, the family ran a good pizzeria. In other hours they were running" the drug trade, Grassi said.

The pizzeria also served as a weapons cache for drug traffickers, investigators said

Police said operatives bought the cocaine in Costa Rica with cash brought in specially constructed suitcases. The cocaine was warehoused in Wilmington, Delaware, and Chester, Pennsylvania, until it could be shipped, using a produce company as a cover, to northern Europe and Italy, investigators said.

The 'ndrangheta has operatives in Australia and Canada, but this probe, code-named Operation Columbus, convinced investigators that the syndicate has increasingly moved its foot soldiers and bosses to the United States, said Renato Cortese, a top Italian police official.

"Because of its blood ties, the 'ndrangheta is a terrible organization," Cortese said. He was referring to the syndicate's ironclad rule of relying on members who have either family or marriage ties. Family pressures discourage turncoats, a small army of whom helped weaken Sicily's Cosa Nostra, which largely chose its mobsters based on skills and not blood ties.

The Calabrian family that ran the pizzeria in New York allegedly turned to the U.S. Mafia's Genovese crime clan for financing so they could invest in the cocaine trade, Calabria-based anti-Mafia prosecutors said.

Follow Frances D'Emilio at www.twitter.com/fdemilio