Hundreds of Central American migrants crossed the Suchiate River between Guatemala and Mexico on Monday.
Videos circulating on social media show people walking and running across the shallow water between the two countries. There have been reports that the Mexican National Guard is using tear gas to repel the refugees and migrants.
The border crossers are part of a caravan of about 3,000 migrants mostly from Honduras and El Salvador. About 1,000 migrants arrived in the southern states of Tabasco and Chiapas over the weekend.
Before they arrived, Mexican President Andres Manuel Lopez Obrador offered to the migrants