Sprawling tents on the US border have been raised as Mexico braced for President Donald Trump to fulfill his pledge to carry out mass deportations.

Several migrants said they had recently arrived in Ciudad Juarez, Mexico after weeks of travel, only to find their CBP One appointments were cancelled.

President Donald Trump's promises of mass deportations, which could bring batches of new arrivals fresh off the border bridges into Juárez, has Mexican law enforcement preparing to keep watch for potential trouble.

The migrants at El Buen Samaritano shelter had waited months to enter the United States through the CBP One app. Now they are stuck in Mexico.

Mexico raised sprawling tents on the U.S. border Wednesday as it braced for President Donald Trump to fulfill his pledge to carry out mass deportations. In an empty lot tight against the border with El Paso,

Ahead of the inauguration, migrant shelters south of the Rio Grande are far from full, a reflection of the tougher measures imposed on both sides of the border.

The Mexican government plans to establish nine reception areas for deportees in Mexico's six northern border states over the coming weeks.

The US-Mexico border is effectively closed off to migrants seeking asylum in the United States within hours of President Donald Trump taking office, an extraordinary departure from previous protocols that has left many concerned migrants in limbo.

By Laura Gottesdiener and Lizbeth Diaz CIUDAD JUAREZ, Mexico (Reuters) - Mexican authorities have begun constructing giant tent shelters in the city of Ciudad Juarez to prepare for a possible influx of Mexicans deported under U.