The southern one.

In 2014, Mexico launched the “Plan Frontera Sur” to tighten border controls, register migrants and stop them using the perilous network of trains known as “La Bestia”, or “The Beast”.

But migrants quickly adapted.

Elisabel Enriquez, Guatemala’s vice-consul in Tapachula, said migrant smugglers now rent trucks and shuttling migrants from southern Mexico all the way to the U.S. border over 2,000 km away for up to $8,000 per person.

Two such trucks were stopped in recent weeks, she said, one stuffed with about 115 migrants and the other about 60.