In the Rio Grande Valley, Mexican authorities do not take back non-Mexican families with children under age 7, citing insufficient shelter space, so smugglers use the area for families who fit that profile. Elsewhere along the border, Mexico does not accept returns from non-Spanish speaking countries, and limits the number of people it will take back in areas with little shelter capacity, giving migrants who cross in those areas a better shot at getting released on the U.S. side.
Source: Washington Post July 06, 2021 17:48 UTC