Hundreds of people from the so-called "Central American migrant caravan" have reached the U.S.-Mexico border to ask America for asylum.
The group, comprised of about 400 migrants from Honduras, Guatemala and El Salvador, had made a month-long trip to reach the border city Tijuana on Sunday.
They were welcomed by U.S. immigration activists rallying on the San Diego side.
The migrants were hoping to get safe passage to the United States, but faced trouble upon arrival as U.S. immigration officials announced that the San Diego crossing was already at full capacity.
Border officials also warned that those whose asylum cases were not strong enough would face detention or deportation.
Organizers and activists lashed out the authorities saying they had ample time to prepare for the influx of migrants, which they knew was coming.
The migrant caravan had drawn ire from President Trump, who pressured Mexico to stop the convoy by threatening to pull out of the North American FTA if it failed to do so.