SAN DIEGO — Migrants waiting to enter the US using former Joe Biden’s CBP One app broke down in tears after their appointments were canceled the moment President Trump took office Monday – just the first of the sweeping border actions the new administration prepared for the first day.

Migrants who waited months to cross the U.S. border with Mexico learned their CBP One appointments had been canceled moments after Donald Trump was sworn in as president.

The Trump administration has ended use of the border app called CBP One that allowed nearly 1 million people to legally enter the United States.

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.

Long-term appointments were canceled when the CBP One scheduling app was halted after Donald Trump’s inauguration.

The CBP One app has been highly popular, functioning as an online lottery system that grants appointments to 1,450 people daily at eight border crossings. These individuals enter the U.S. under immigration "parole," a presidential authority that Joe Biden has exercised more frequently than any other president since its creation in 1952.

The Trump administration has shut down the CBP One app for migrants. The Biden-era process allowed nearly 1 million migrants to enter the US at legal border crossings. We reported that an estimated 270,000 migrants are waiting in Mexico, hoping to use the app to enter the US. https://t.co/pIKlzjspjA pic.twitter.com/8Cpv1IcLhj

A secret tunnel discovered last week on the U.S.-Mexico border will be sealed by Mexican authorities, an army official in Ciudad Juarez said Saturday.

Migrants, activists, and religious organizations remained on high alert on Friday at one of the main border crossings between Mexico and the United States in Ciudad Juárez, as Donald Trump prepares to take office again on Jan.

Data shows birthright citizenship hasn't changed much since 2000 as Trump wants to end it for children of illegal immigrants.

The Trump administration is ending use of a border app called CBP One that has allowed nearly 1 million people to legally enter the United States with eligibility to work.

In his speech at the U.S. Capitol, Trump outlined a flurry of executive orders he plans to sign during his first day back in office. President Trump signed an executive order Monday aimed at protecting TikTok from a new law banning the app. Legal experts say this order still leaves the company on shaky ground.