In the small town of Veracruz, Mexico, at a gas station and truck stop, two nuns began stopping big rigs Sunday to fill the trailers with waiting migrants from the caravan.

The caravan is trying to make 116 miles, a record for them, considering the first day of walking in Mexico they traveled just 20 miles.

The Catholic nuns at the scene are from Guadalajara’s Misioneras de Christo Resuscitado.

Related: Trump’s Crackdown on Illegal Immigrants Protects All Americans

And as a big red 18-wheeler approached, the nuns flagged down the driver, stepped on the running board on the passenger side, and spoke with him for about five minutes.

The driver then gave a reluctant wave of the hand.

One of the nuns spoke — and dozens of young men ran to the rear of the truck to open the two tall metal doors.

An organizer appeared with a bullhorn and loaded dozens of women and children and strollers inside.

Related: Treat Rocks as ‘Rifles’ — Here’s Why Trump Said This When Referring to the Caravan Migrants

As soon as that truck left, with one door tied open, another approached.

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And again the nuns convinced him to fill his empty trailer with migrants.

Their destination Sunday is Cordoba, the city of Puebla on Monday, and Mexico City by Tuesday.

Migrants say they are likely to stay in the capitol city for three days before continuing on to Tijuana as a caravan.

Four caravans are currently traveling inside Mexico, totaling some 12,000 Central American migrants.

In Mexico City, they are tentatively planning on camping at Ciudad Deportiva Magdalena Mixhuca, a large space near the city’s Formula One racing facility.

Both the mayor of Cordoba and the governor of Veracruz tried to provide the caravan with buses, but were told by federal officials they could be prosecuted for human trafficking.

So they withdrew the offer.

Related: Why the Caravan Migrants Are Suing President Donald Trump — Details Here

Four caravans are currently traveling inside Mexico, totaling some 12,000 Central American migrants.

For more on the caravan migrants — and to learn why the Department of Homeland Security says the caravans include criminals, check out this video just below:

This Fox News piece by William La Jeunesse is used by permission.

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