A member of Mexico's Federal Police tries to grab migrants as they attempt to cross the border into the United States on Sunday, November 25.
Adrees Latif/REUTERS

In photos: Unrest at the US-Mexico border

Updated 11:08 PM ET, Sun November 25, 2018

A member of Mexico's Federal Police tries to grab migrants as they attempt to cross the border into the United States on Sunday, November 25.
Adrees Latif/REUTERS

A major port of entry in San Diego was closed for several hours on Sunday after a group of migrants on the Mexican side of the border rushed the area, leading US Border Patrol agents to fire tear gas at the group.

About 500 migrants overran Mexican police near the San Ysidro Port of Entry, two journalists at the scene told CNN. As the migrants tried to cross the border, agents on the US side deployed tear gas to disperse them. US Customs and Border Protection said migrants threw rocks at Border Patrol agents, prompting agents to respond with tear gas because of the risk to their safety. Mexican and US authorities said several people were arrested on suspicion of attempting to cross the border illegally.

The incident marked an escalation of tensions that have been mounting since groups of Central American migrants began arriving in the Mexican border city of Tijuana, drawing threats from US President Donald Trump to close the border. Meanwhile, Tijuana's mayor and city residents have been calling for the migrants' exit.