A migrant caravan of 400 people, composed mostly Central Americans and Haitians, has been traveling to the United States from the southern Mexico town of Tapachula since last Saturday. Many are fleeing poverty and violence from their home countries.

Mexico has been cracking down on caravans, with security forces and migration officials dispersing another large caravan earlier in the week.

Mexican President Andres Manuel Lopez Obrador has promised humane treatment for migrants in the country, while officials from Mexico and the U.S. hold talks to discuss long-term solutions for the migration issue.

Check out The China Report, our new weekly newsletter. Subscribe here!