Hours after the Pentagon announced that it would send 1,500 active duty troops to the U.S.-Mexico, reports surfaced that the number was actually 10,000.

US law enforcement agents carried out exercises using barbed wire and concrete blocks Friday at a crossing on the border with Mexico as tensions crept up ahead of President-elect Donald Trump's inauguration.

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.

U.S. officials say active duty military troops are arriving in El Paso, Texas, and in San Diego on Thursday evening.