Protesters pledged to stand firm. Said the director of a group called the Organization for Black Struggle: "We will not go away."
Mansur Ball-Bey, who police said had a handgun, was shot as officers raided a home in a violence-plagued part of north St. Louis. Within an hour of Wednesday's shooting, more than 100 people converged on the scene, taunting officers and decrying the use of deadly force.
A vacant building and at least one car were torched, police said. Officers responded with tear gas and arrested at least nine people on charges of impeding traffic and resisting arrest.