Puerto Vallarta, Jalisco, Mexico - During the recent two-week Easter vacation period, Immigration officials at the Puerto Vallarta Airport denied entry to four foreign citizens with criminal records in their home country for sex-related offenses, according to Jalisco Government Secretary Arturo Zamora.

Zamora reported that the men were between the ages of 33 and 55, but he did not reveal their nationalities or identities. All were flown back to their home countries by the airlines on which they arrived.

Zamora went on to say that the visitors were identified before they entered Mexico, thanks to an international interchange of information.

At the end of March Zamora announced that during the previous nine months 38 foreigners convicted in their home countries of sexual crimes against minors had been refused entry into Mexico by immigration staff working at the Guadalajara and Puerto Vallarta airports.

All of this, thanks to a program known as "Guardian Angel," which allows Mexican Immigration officials to identify and prevent people with previous criminal convictions from entering the country.