A group of women and children passed through to the USA side of the border with Mexico on Wednesday, part of the caravan of Central Americans seeking asylum in the United States.
Media coverage of the US-bound caravan triggered a flurry of furious tweets from US President Donald Trump, who ordered thousands of National Guard troops to the border and called on Mexico to stop the migrants.
But migrants from this caravan are at a port of entry and asking for asylum.
Another 62 migrants were still waiting for a chance to begin the asylum process, he said.
Thus far, the only major push to prevent the caravan from gaining entry to the country has come from Attorney General Jeff Sessions, a longtime opponent of mass immigration. Numerous caravan participants are migrants fleeing violence in Honduras, Guatemala and El Salvador. "Make your claim to enter America in the lawful way and wait your turn", he said, adding that he would not let the country be "overwhelmed".
"I can't take it here anymore", said one migrant who was admitted into the US Wednesday. Though it is an annual event, this year's march received outsize attention thanks to reports from USA media describing the ways in which Mexican authorities were helping the migrants reach the border.
First to try was a man and his small nephew, a football under his arm; then a mother and child; then a woman with her grandsons. As of Wednesday, about 65 of the Central American migrants had been allowed to pass through the San Ysidro pedestrian gate to apply for asylum, according to to immigration lawyers there.
Trump wants to tighten laws to make it harder for people to claim asylum.
"The caravan members that are camped out at the border are trying to access a legal process which has existed for decades".
"The migrant "caravan" that is openly defying our border shows how weak & ineffective USA immigration laws are", Trump tweeted on Monday.
Sessions said that an additional 35 assistant U.S. attorneys and 18 immigration judges to the crossing.