U.S. blocking Mexican asylum seekers at multiple border crossings

At least 1,000 Mexican migrants were reportedly camped at three border bridges last week.  (Gary Coronado / Los Angeles Times)

Volunteers in Ciudad Juarez feed Mexicans seeking political asylum in the U.S.  (Gary Coronado / Los Angeles Times)

Migrants in Ciudad Juarez.  (Gary Coronado / Los Angeles Times)

Miguel Angel Gutierrez, right, of Emmanuel of Suarez Evangelical Ministry holds a prayer service with migrants in Ciudad Juarez.  (Gary Coronado / Los Angeles Times)

Mexicans seeking political asylum walk toward the Bridge of the Americas to present themselves to U.S. immigration officials in Ciudad Juarez.  (Gary Coronado / Los Angeles Times)

Mauricio Castro of Michoacan, Mexico, with his wife, Brenda Marin, and son Mauricio, 3, along with other Mexicans seeking political asylum. Castro said he and his family fled after he received threats and his home was hit with bullets.  (Gary Coronado / Los Angeles Times)

Migrants check to see whether there number has been called to present themselves to U.S. immigration officials.  (Gary Coronado / Los Angeles Times)

Migrants wait on the border.  (Gary Coronado / Los Angeles Times)

A migrant camp in Ciudad Juarez.  (Gary Coronado / Los Angeles Times)