A migrant family, part of a caravan of thousands traveling from Central America en route to the United States, run away from tear gas in front of the border wall between the U.S and Mexico in Tijuana on Sunday (DM)

US Border Patrol shot tear gas and rubber bullets at a group of migrants, including toddlers, as members of the caravan tried to storm the border. 

 
Children were screaming and coughing in the mayhem at the San Ysidro Port of Entry when American agents tried to push the surging Central Americans back.  

They started to use crowd control on Sunday afternoon when migrants tried to cut a hole in the concertina wire gap on the Mexican side of the fence.  

The tensions prompted US officials to close the crossing between Tijuana and San Diego, stopping thousands of people travelling legitimately between the US and Mexico.   Homeland Security Secretary Kirstjen Nielsen said she would not put up with this ‘lawlessness’ and threatened harsh punishments on anyone who ‘anyone who destroys federal property, endangers our frontline operators, or violates our sovereignty’.   She later added that border personnel were ‘struck by projectiles thrown by caravan members’
US, (Daily Mail), 26 November 2018