Several dozen protesters, some waving U.S. flags and signs denouncing illegal immigration, converged Tuesday outside the Border Patrol facility in Murrieta. The buses finally backed away from the facility. Their destination was not immediately known.
The protesters are upset that 136 migrants — mainly families and children — were flown to San Diego from Texas on Tuesday.
U.S. authorities are trying to deal with tens of thousands of immigrants, many of them unescorted children, who since October have flooded across the U.S. border with Mexico in the Rio Grande Valley.
President Barack Obama has called it a humanitarian crisis.