Angry protesters repeatedly shouted "We are Michael Brown" as they demonstrated against the shooting of an 18-year-old college student.
Residents, at the scene of the shooting in Ferguson, St Louis, chanted "please don't shoot me" towards police officers.
Some later marched to the police department headquarters to continue protesting.
The peaceful protesters are now at the Ferguson Police Department exercising their first amendment right . http://t.co/AMqyYGcd1Z
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Emergency services rushed to the scene to douse the flames, but there were no immediate reports of casualties.