Migrant caravan heads toward U.S. southern border ahead of Blinken's trip to Mexico

A caravan of thousands of migrants continued its dayslong march through Mexico toward the southern U.S. border Wednesday, hours ahead of a scheduled meeting between Secretary of State Antony Blinken and Mexican President Andrés Manuel López Obrador.

About 7,500 people from 24 different countries were believed to be part of a massive group making its way north Wednesday through the Mexican state of Chiapas on the border of Guatemala, Luis García Villagrán, an organizer of the migrant caravan and activist, told NBC News. He said a group of women, children and sick people was farther ahead and had reached Mapastepec.

Most of the migrants are from Central America, Cuba, Venezuela and Haiti, he said, but some come from as far as Turkey, Iran, Syria and Cameroon.