The migrants came from as far away as Nepal and as nearby as Mexico . Experts say many migrants passing through Mexico on their way to the United States are victims of violence along the Mexico-U.S. border , but the journey is perilous from the moment it begins . Mexican authorities say X - ray doctors detected the migrants hidden in a cave . They showed symptoms of asphyxiation , authorities say . The migrants had paid thousands of dollars to come to the United States .
The migrants came from as far away as Nepal and as nearby as Mexico . Mexican authorities say X - ray doctors detected the migrants hidden in a cave . They showed symptoms of asphyxiation , authorities say . The migrants had paid thousands of dollars to come to the United States .