Thousands of people rallied in US cities including Los Angeles and New York to protest a grand jury's decision not to indict a white police officer who killed an unarmed black 18-year-old in Ferguson, Missouri.
Gunshots rang out and police lobbed tear gas at an angry crowd in suburban St. Louis after the grand jury decision was announced late on Monday.
Angry protesters overran barricades and taunted police in Ferguson, with some chanting "murderer" and others throwing rocks and bottles, as police car windows were smashed and protesters tried to set vehicles ablaze.
Officers responded by firing what authorities said was smoke and pepper spray into the crowd, as some in the crowd tried to stop others from taking part in the violence.
Activists had been planning to protest even before the nighttime announcement that officer Darren Wilson would not be charged in the shooting death of Michael Brown on August 9.
Wilson shot Brown at least 12 times according to evidence presented to the grand jury, with witness reports differing as to whether and when Brown had his hands raised.