BRENTWOOD, Mo. — Protesters upset by the grand jury’s decision not to indict the Ferguson, Missouri, officer who killed 18-year-old Michael Brown have disrupted shopping in suburban St. Louis for the second straight day.

Demonstrators marched through a Trader Joe’s store in Brentwood, about 10 miles south of Ferguson, around noon Saturday. After leaving they briefly blocked Eager Road near Interstate 170.

On Friday, three St. Louis-area malls were briefly shut down due to demonstrations. Protest organizers planned to meet later Saturday to consider other plans for the coming days.

Brown was killed by Officer Darren Wilson on Aug. 9. The grand jury decision was announced Monday, leading to unrest, some of which turned violent. Several businesses in and around Ferguson were destroyed by fire.

Sixteen people were arrested Friday, according to St. Louis County Police spokesman Shawn McGuire. Fifteen of those arrested were for misdemeanor peace disturbance. One man, Joygill Moriah of the Bronx, New York, was charged with assaulting a police officer, resisting arrest and peace disturbance. He did not have a listed attorney. Only one of those arrested was from the St. Louis area. Eight were from New York City.