(CNN) -- At a shelter near Mexico City, Belkis Nunez is recovering. She's lying down on a bunk bed at the San Juan Diego Migrant House in Tultitlan, just north of the Mexican capital. The Honduran migrant says she's lucky to be alive: She was traveling on a cargo train in southern Mexico with other migrants when a group of armed men assaulted them. They were held at gunpoint and threatened. All were robbed and one of assailants held Nunez captive. Nunez, 23, says she had no option but to obey her captor's orders. He was demanding money. "And then I told him, 'I'm not carrying any money, not at all. I'm with them.' And he asked me 'Which one of them is in charge of you?' 'No one; we're just all together.' And then he said 'OK, you women are always putting the money in your privates or in condoms," Nunez says.
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Central Americans traveling through Mexico toward the United States are often targeted
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Belkis Nunez considers herself lucky to be alive after armed robbers attack her group
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Dozens of migrants are missing or dead from two other attacks
The ranch where they were found was only 100 miles away from the @placeholder-Mexico border.