A new migrant caravan of approximately 2,000 people formed in southern Mexico on Monday, largely made up of people that have been on the move since Christmas Eve who say the Mexican government's promises of transit visas last week never materialized. The migrants, including some carrying young children, are walking to the southern Oaxaca town of Tapanatepec, about 800 kilometers (480 miles) south of Mexico City by road. The group of mostly Central American and Caribbean migrants are ultimately headed for the U.S. border, the caravan's leader Luis Villagran said.