Thousands of migrants from Central America left southern Mexico on November 20, aiming to reach the US before President-elect Donald Trump takes office in January.
The group hopes to avoid possible immigration controls and continue to use the CBP-ONE asylum system to enter the country.
Trump has promised mass deportations as soon as he takes office.
Migrants seek free movement permits in Mexico to reach the US border. Caravans of the past have often dispersed along the way.
