“We are here to save these children who are precious unto us,” said the Rev. Ben McBride, co-director of the faith-based group PICO California that led the Otay Mesa event.“Give it all you’ve got,” he told the protesters. “They’ll come for your children next.”

Another clergyman, Sacramento pastor Les Simmons, said the protests and demonstrations will continue “until these kids are back with their families.” “We have to be the moral conscience of America,” Simmons said.

The detention center was the site of a visit a day earlier by Sen. Kamala Harris, who was joined by hundreds of protesters there to denounce Trump’s immigration policy. Many more rallies have been planned nationwide for next Saturday under the rubric of Families Belong Together, described as “a coalition of Americans who oppose the mistreatment of immigrant families, and indeed all immigrants, by the current administration and past administrations.”

The group’s website says marches are set to happen in downtown San Diego, El Cajon and Encinitas.Demonstrators also said they planned to return to the detention center next weekend.