There have been an increasing number of reports this week that U.S. immigration authorities in Southern California have been conducting raids and arresting suspected undocumented immigrants. The arrests have reportedly been made in San Bernardino, Downey, Van Nuys, Oxnard, and Santa Clarita. U.S. immigration authorities have so far been tight-lipped about the reports. Here's more from KPCC's Adolfo Guzman-Lopez.