Mexican authorities are investigating the disappearance of three Italian men in the western state of Jalisco.
The Naples natives reportedly went missing on Jan 31 after being detained by police at a gasoline station in the municipality of Tecalitlan in southern Jalisco, says a Reuters report.
The Mexican authorities say they are collaborating in their investigation with Italian diplomats.
Over the weekend family members and friends took to the streets of Naples to demand that Mexico’s government locate Raffaele Russo, Antonio Russo and Vincenzo Cimmino.
Last year was Mexico's most violent year on record, with more than 25,000 murders, according to the BBC.
Organised crime - and feuding drug cartels in particular - accounts for nearly three-quarters of those deaths, officials say.
Jalisco is one of Mexico's most violent states, where corrupt police officials often collude with gangs.
Mexican authorities said on Monday they are investigating whether police in the western state of Jalisco participated in the disappearance of three Italian citizens there.