The San Ysidro Port of Entry began closing lanes and pedestrian crossings Sunday morning amid marches on both sides of the border in support of the migrant caravan.
U.S. Customs and Border Protection closed all southbound lanes into Mexico at the San Ysidro Port of Entry at around 11:15 a.m.
Northbound vehicle traffic processing at the San Ysidro Port of Entry was also suspended.
Shortly after, CBP closed pedestrian crossings at the east and west facilities.
CBP agents could be seen in riot gear, lining the roadway that leads into Mexico.
Military helicopters could be seen flying around in the area.
The San Ysidro Port of Entry is the busiest land border crossing in the world, with about 110,000 people entering the U.S. every day. That traffic includes some 40,000 vehicles, 34,000 pedestrians and 150 to 200 buses.
This also comes as families started heading home after the Thanksgiving weekend.
Because of the activity in the area, the Blue Line Trolley will not serve the San Ysidro Transit Center, the San Diego Metropolitan Transit System said at 12:30 p.m.
The trains will stop at Beyer Boulevard. MTS suggested Mexico-bound travelers should get off at Iris Avenue and transfer to Routes 905 or 950 to the border in Otay Mesa.
Nearly 20 migrant rights and social justice groups make up the San Diego Migrant and Refugee Solidarity Coalition, which hosted the U.S.-side march.
The coalition and others started at Larsen Field on Camino de la Plaza.
The group said President Trump created a “war-like situation at the border.”
Other marches were planned across the nation, including in L.A., Sacramento, and San Francisco.
In Tijuana, supporters and members of the migrant caravan began marching toward the border. They are protesting and demanding to have their asylum requests processed.
This comes after the Trump administration began working on major changes to immigration law, including having asylum seekers wait outside the U.S. while their applications go through the courts.
The mayor of Tijuana has declared a humanitarian crisis as thousands of migrants live in overcrowded shelters, waiting to enter the U.S.
Click here to view a statement from the coalition.
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