Eventually the group will enter the U.S.at the San Ysidro port of entry.
About 130 Central Americans in a "caravan" of asylum-seeking immigrants that drew President Donald Trump's fury has arrived in the Mexican city of Tijuana bordering the U.S.
Event organizers say they are marching in the name of migrants who "suffer repression and violence in their own country and for their human right to seek asylum in the country of their choice". Though it is an annual event, this year's march gained prominence thanks to reports from USA media outlets describing the ways in which Mexican authorities were helping the migrants reach the US border.
Media coverage of the US-bound caravan triggered a flurry of furious tweets from Trump, who ordered thousands of National Guard troops to the US-Mexican border and called on Mexico to stop the migrants.
The caravan started in late March in Tapachula, a city in Mexico's southernmost state of Chiapas, as roughly 1,100 Central-American migrants banded together for safety and to make a political statement about migration and borders.
Another several hundred caravan members are expected to arrive in the coming days - one contingent traveling in a convoy of buses and another riding atop freight trains. The Trump Administration is committed to enforcing our immigration laws - whether persons are part of this "caravan" or not.
After Trump's comments, Mexican authorities stalled the caravan in a southern town and began handing out temporary visas that gave them legal status to travel to the border.
"DHS, in partnership with DOJ, is taking a number of steps to ensure that all cases and claims are adjudicated promptly - including sending additional USCIS asylum officers, ICE attorneys, DOJ Immigration Judges, and DOJ prosecutors to the Southern border".
Those broadly written rules mean caravan migrants can not be turned away without being given a chance to apply for asylum, March Without Borders organizers say.
Castro and most of the other asylum-seekers come from Honduras, where a divisive presidential election has led to killings in the streets.