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.

As much of the nation watched Trump take office for the second time in history, a border agent in Vermont was reportedly shot dead by a migrant.

Migrants, many who have waited for months in Mexico, must find new way to seek asylum now that President Trump pulled the plug on CBP One app.

The Trump administration has terminated the CBP One app, which allowed migrants to schedule legal border entry appointments. The move fulfills Trump's campaign pledge but cancels nearly 1 million appointments.

WASHINGTON (AP) — Trump pone fin a CBP One, una app de la era Biden que daba entrada legal a casi 1 millón de migrantes con citas online.

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

The president moved quickly to cancel the CPB One app, which allowed migrants to schedule appointments to gain entry into the United States, turning away potentially tens of thousands of migrants.

The CBP One app has been wildly popular. It is an online lottery system to give appointments to 1,450 people a day at eight border crossings. They enter on immigration “parole,” a presidential authority that Joe Biden used more than any other president since it was introduced in 1952.

By Ted Hesson and Alexandra Ulmer WASHINGTON/PIEDRAS NEGRAS, Mexico (Reuters) -President Donald Trump on Monday kicked off his sweeping immigration crackdown, tasking the U.S. military with aiding

WASHINGTON (AP) — Trump ends CBP One, a Biden-era border app that gave legal entry to nearly 1 million migrants with online appointments.

Jason Owens, the retiring chief, said he hopes future leaders remain impartial and keep politics out of the agency.