race riot 
noun
A public outbreak of violence due to racial antagonism.She is about 13 years old, living proof of the tensions that have grown up over decades in Redfern, passing down the generations and exploding into a full-blown race riot....
- White resistance to further expansion, exacerbated by the postwar competition for jobs and rising political tensions, strained racial amity and led to a bloody race riot in 1919.
- In response to a Tallahassee race riot in August 1944, the association condemned mob violence and supported the governor and police for quick action in suppressing the violence.