Around 2,000 migrants have agreed to return to their countries of origin with the help of the Mexican authorities. Mexican police officers in riot gear stopped many, but those who continued toward the fence met US border agents, who sprayed some with tear gas. Many say they are fleeing violence and poverty in Honduras.
A young woman fell to the ground unconscious, and two babies cried, tears streaming from the gas.
Trump wants migrants to remain in Mexico while their USA asylum cases are adjudicated.
"Mexico should move the flag waving Migrants, many of whom are stone cold criminals, back to their countries", Trump tweeted. What the caravan riders didn't expect, however, was the Border Patrol utilizing tear gas to keep them from successfully crossing into the United States.
The melee left what is known as the busiest land port of entry in the Western Hemisphere quiet for several hours as CBP temporarily closed off vehicle and pedestrian traffic at San Ysidro.
According to the ministry, no casualties have been registered among migrants following their attempt to illegally enter the United States, and the situation at the border is under control.
The president is putting more pressure on Mexico, warning that he might close the southern border "permanently" if necessary.
In order to enter the U.S. legally, migrants must apply for asylum, but the process can last for up to a year.
"As I have continually stated, D.H.S. will not tolerate this type of lawlessness and will not hesitate to shut down ports of entry for security and public safety reasons", Nielsen said.
Throughout the day, U.S. Customs and Border Protection helicopters flew overhead, while U.S. agents on foot watched beyond the wire fence in California.
"People had thought that they were going to open the gates, but that was a lie", Caballero said.
Some of the migrants tried to breach the border fencing and "sought to harm CBP personnel by throwing projectiles at them", the statement said, referring to Customs and Border Patrol. Many residents of Tijuana work, study and visit the United States each day, and the border closures affect them, too, Juan Manuel Gastlum said on Twitter on Sunday. "We want to see if they'll give us permission to go to the USA", she said.
He also demanded that Congress fund his promised wall proposed for the border.
Earlier Sunday, Gastelum said he will not allow bilateral relations to be broken by bad actions of the migrant caravan. It said that 1,906 of those who have returned were members of the recent caravans.
The Mexican Interior Ministry said Sunday that since October 19, it had sent almost 2,000 Central Americans who were part of recent caravans back to their countries. News slowly spread as the Thanksgiving holiday weekend wrapped up and millions were traveling back home, but by Monday morning countless Americans expressed outrage.