The police chief in Los Angeles says the small number of people who are committing violence as others peacefully protest won't be tolerated.

Thirteen people were arrested after they allegedly broke windows, attacked people on sidewalks and at one point raided a Wal-Mart Monday night. Several hundred people spent a third night protesting the acquittal of George Zimmerman in the shooting death of 17-year-old Trayvon Martin.

[Associated Press]