Mexican authorities are investigating the disappearance of three Italian men in the western state of Jalisco, BBC reports.
Vicenzo Cimmino, Raffaele Russo and Antonio Russo - all from Naples - were last seen on New Year's Eve in the Tecalitlán municipality.
Some reports say the Italians went missing after being detained by police at a petrol station.
Italian diplomats are helping the investigation, the Mexican authorities say.
Mexican investigators said the three men were in Jalisco "for business", but did not specify what that business was.