In response to migrants gathering at the southern border in hopes of entering into California, U.S. Customs and Border Protection shut down a major San Diego port Sunday.

According to CNN, road and pedestrian bridges were closed going both directions at the port of entry in San Ysidro, one of the biggest connecting the U.S. and Mexico.

Matters appear to have since escalated, one Associated Press reporter tweeting that tear gas had been shot into the crowd, causing the wind to carry it “hundreds of yards” as parents were seen “running away with choking toddlers.”

A migrant family, part of a caravan of thousands traveling from Central America en route to the United States, runs away from tear gas in front of the U.S.-Mexico border wall in Tijuana, Mexico.

(????: Kim Kyung-Hoon/Reuters) pic.twitter.com/pz7hkxsN9g

— NBC News (@NBCNews) November 25, 2018

The border chaos comes just hours after President Donald Trump tweeted that morning again accusing Democrats of creating immigration issues, arguing it “Would be very SMART if Mexico would stop the Caravans long before they get to our Southern Border, or if originating countries would not let them form.”

Would be very SMART if Mexico would stop the Caravans long before they get to our Southern Border, or if originating countries would not let them form (it is a way they get certain people out of their country and dump in U.S. No longer). Dems created this problem. No crossings!

— Donald J. Trump (@realDonaldTrump) November 25, 2018

Twitter is rightfully sickened:

Look at this photo of asylum seekers, women and kids, running away from tear gas that the United States Border Patrol launched into Mexico. We should be welcoming in refugees fleeing oppression, not greeting them with violence. This is Trump’s America. Heartless and sadistic. pic.twitter.com/wzfSmPMtFy

— Adam Best (@adamcbest) November 25, 2018

The Trump administration has gone from locking babies in cages to firing tear gas at toddlers & mothers. The situation at the San Ysidro border crossing should horrify all Americans. These people have a right to seek asylum here. Denying them entry makes a mockery of our values. pic.twitter.com/weRgADQQ7F

— Guthrie Graves-Fitzsimmons (@GuthrieGF) November 25, 2018

Nothing says Happy Birthday Jesus more than spraying tear gas on thousands of families seeking shelter. Thank you Trump for bringing back the spirit of Christmas!

— Alt Fed Employee (@Alt_FedEmployee) November 25, 2018

The #Trump administration, therefore the country, is firing tear gas on children at the #border. Seeking asylum at a legal border entry is legal under United States law. We have children still separated from parents in huge numbers and now we attack more with chemicals. Horrific.

— Susan Jalech (@SusanJLCH) November 25, 2018

#BREAKING: Trump's border patrol just sprayed innocent women and young children with tear gas. Dozens of young children are collapsing from not being able to breathe but are being refused medical help. What have we become? https://t.co/zhwm8OYKZP

— CADOF (@CADOF1) November 25, 2018

The US' refusal to process asylum seekers per the law, and attacking them with tear gas on top of it all, is horrible, criminal and frankly, creating a situation that feeds the xenophobic narrative that Trump peddles a bit too conveniently, all while further oppressing migrants.

— Marce G. Graudiņš (@minsd) November 25, 2018