U.S. Customs and Border Protection Commissioner Kevin McAleenan says 69 migrants were arrested on the California side of the border after trying to cross from Tijuana to the U.S. during a confrontation where agents fired tear gas.
USA agents fired tear gas into Mexico Sunday to stop some migrants who tried to breach the border. Now, Trump has responded to the whole ordeal.
Hundreds of migrants near Tijuana, Mexico broke through Mexican police lines and bolted for the USA border on Sunday.
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Speaking on Fox & Friends on Monday, Ronald Colburn downplayed the use of crowd-dispersing spray, saying it was simply "pepper spray" and not tear gas.
USA border patrol agents used tear gas to force the crowd back and shut the crossing - the busiest on America's southern border - for several hours, though it was back open on Monday.
Officials reopened the pedestrian border crossing around 3:45 p.m. Sunday, then reopened vehicle lanes around 5 p.m. "Any additional resources that we assign to processign asylum seekers literally slows down the economy of the United States".
Video footage shows scores of migrants breaking down portions of the border fence near the city of Tijuana and crawling through the open space.
Homeland Security Secretary Kirstjen Nielsen said in a statement that US authorities will continue to have a "robust" presence along the Southwest border and that they will prosecute anyone who damages federal property or violates USA sovereignty.More news: Brexit: Britain's Theresa May holds pre-summit talks
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Hundreds of people were peacefully protesting near the US border in Tijuana, chanting that they aren't criminals, when a smaller group broke off and headed toward the border fence. The Ministry of Interior said the main caravan has 8,247 people, with 7,417 of those located in Tijuana or nearby Mexicali.
For weeks before the 6 November congressional elections, Trump raised the alarm about the migrant caravans and ordered some 5,800 USA troops to the border to support border patrol agents.
The group were stopped by a chain-link fence topped with barbed wire and repelled by US Border Patrol agents firing tear gas shells and rubber bullets, an AFP journalist on the scene saw. Many hope to apply for asylum in the US, but agents at the San Ysidro entry point are processing fewer than 100 asylum petitions a day.
With the approaching migrant caravan, Mexico's incoming government has denied reaching a deal with Trump administration on asylum overhaul; Bryan Llenas has more details.
Some members of the caravan carried Honduran flags and yelled, "We are not criminals!"
Thousands of migrants have been gathering there after crossing through Mexico in a series of caravans that originated from Central America - and presumably are amongst those who were arrested on both sides of the border.
Although Sunday's incident took place at a part of the border where there is already a physical barrier, Trump again urged Congress to fund his long-promised border wall, as well as reiterating his unsubstantiated assertion that there are many criminals among the migrants.
The Trump administration has said asylum claims from members of a series of caravans originating in Central America must be processed outside the US, and that all those entering illegally will be denied.