A train seen in Mexico headed toward the U.S. border had what appeared to be hundreds of migrants riding on top as record numbers of people trying to enter the United States continues.

The migrants were riding atop a BNSF Railway train in central Mexico as it departed from it departs Irapuato, Guanajuato, around 200 miles northwest of Mexico City.

The train route goes from there to Torreon, Monterey and then Piedras Negras, a border city across from Eagle Pass, Texas.

In response to a surge in migrants, the U.S. Customs and Border Protection (CBP) said Monday that it will temporarily suspend and reduce vehicle processing at ports of entry in Texas and Arizona.