Missouri Gov. Jay Nixon ordered more National Guard troops to Ferguson after chaos erupted when a grand jury declined to indict a white police officer for killing an unarmed black teenager.

Businesses were looted, police cars burned and a dozen buildings torched after prosecutors said Monday night that they wouldn't charge Officer Darren Wilson in the August death of 18- year-old Michael Brown.

There were 61 arrests by early Tuesday on charges including arson, burglary, unlawful assembly and trespassing, according to an email from Brian Schellman, spokesman for the St. Louis County Police Department. St. Louis city police said they arrested 21 people.