Protesters chanting "free our people" gathered outside the jail in downtown St. Louis Monday but there was no new rioting.
Demonstrators outside the jail late Monday criticized authorities for keeping some of those arrested in jail for nearly 24 hours after they were taken into custody. Police said more than 120 people were arrested during Sunday's protests over the acquittal of a former police officer in the killing of a suspect.
Hundreds of riot police mobilized downtown late Sunday, arresting more than 80 people at one intersection who police said didn't follow orders to disperse. Earlier, police had responded to reports of property damage and vandalism.
Officers were attacked with projectiles, including bottles of chemicals, during the weekend rioting. Some of the arrested subjects had weapons, Interim Police Chief Lawrence O'Toole told the Chicago Tribune.