But the meeting of the incoming administration officials in Mexico City to discuss a response was derailed by the chaotic events along the Ysidro border crossing.
Mexico pledged to shore up security near its border with the United States and local authorities said that 39 migrants were arrested after a peaceful march devolved into chaos when USA agents fired tear gas into Mexico to stop some migrants who tried to breach the border. By Sunday afternoon, CBP reopened crossing lanes in both directions to pedestrians, CBP representative Jackie Wasiluk said.
Unverified video footage showed the migrant caravan breaking the border fence and it is thought they were pushed back with pepper spray by the police.
Following the incident, the Mexican Interior Ministry said it will deport hundreds of migrants who attempted to "violently" cross the border.
The mayor has said previously that the city can not support the migrants. 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.
Authorities on the US side used tear gas to disperse the would-be crossers, the journalists told CNN.
As crowds amassed at San Ysidro, around 500 migrants overwhelmed federal and local Mexican police blockades and rushed toward the border, said freelance reporter Alfredo Alvarez, who is in the crowd. They have been waiting in a stadium in Tijuana for the chance to gain entry to the United States. Many hope to apply for asylum in the USA, but agents at the San Ysidro entry point are processing fewer than 100 asylum petitions a day. If they agreed to the "Remain in Mexico" policy, those caravan members - and nearly certainly many thousands more who are on their way to the USA - would have to be cared for in Mexico while they await the outcome of their asylum requests.
Thousands of migrants began arriving in Tijuana about 10 days ago and have been housed since then in squalid conditions in a community sports center that has been converted into a makeshift shelter. Every day more than 100,000 people enter the USA there.
The Washington Post reported Saturday that the administration of U.S. President Donald Trump has won support from the Mexican president-elect's team for a plan dubbed "Remain in Mexico". A Washington Post report Saturday indicated that the us and Mexico had come to a deal around such an arrangement, but in a separate report that followed, Mexican officials denied a deal had been made.
The demonstration was made up of members of a caravan of over 7,000 immigrants from central America seeking to apply for asylum in the US.
Mexico is on track to send a total of around 100,000 Central Americans back home by the end of this year.