A combined 42 arrests were made by the Los Angeles Police Department, California Highway Patrol and Los Angeles County Sheriff's Department, the LAPD said early Monday. Alleged crimes included attempted murder, looting, arson, failure to disperse, assault with a deadly weapon on a police officer and other offenses.

is one source, others may have more or less detail. It supports arrests being made wrt looting, not the assertion that most of the looters were arrested.