A HUGE 200-strong Antifa mob stormed downtown Tacoma and tried to break down a jail fence after cops ran over a man at a Fast and Furious-style burnout.
Video and images also showed fires, broken windows and anti-police graffiti scrawled on buildings — just days after anarchists wreaked havoc in Portland, Oregon.
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The militants had flocked to the city in Washington state after on Saturday.
They blocked roads and set trash cans on fire.
Photos also showed the windows of a bail bond business smashed and the words "KILL COPS" daubed on another building.
The mob also marched on Pierce County Jail, stopping to chant "free them all!" as some tried to pull down its fence.
Meanwhile, Tacoma Police Department spokesperson Wendy Haddow said that staff at South Sound 911 Records — which provides information services for law enforcement agencies and the public — had to be evacuated after their windows were broken.
Police earlier declared the assembly unlawful and deployed dozens of officers who lined up to block the march.
No arrests were made, although two people were detained in the build-up to it.
It came after days of following one to mark the inauguration of Joe Biden.
Demonstrators marched on the Democratic Party's Oregon headquarters, smashing windows and graffitiing the outside of the building.
Federal police also fired tear gas after rock and eggs were thrown at the city's Immigration and Customs Enforcement building.
Recent days have also seen across the US.
'DEADLY FORCE'
The protest in Tacoma was sparked after footage posted to social media showed a police car driving through a crowd of people on a street, knocking several people to the ground and running over at least one.
The incident reportedly occurred just before 7pm on Saturday after police received reports of people gathered to watch an illegal drag race.
The group had reportedly been watching drag racers perform circular "burnouts", in which a driver revs the engine of their car and spins in tight circles, causing the tires to heat up and give off smoke.
Footage showed the car — a mini SUV — drive slowly up to a crowd stood at an intersection, slowing a few short of the group.
The group then crowd round the front and side of the car and begin banging on its hood and windows.
The car's engine is then heard revving and it moves quickly forward, knocking people to the ground.
Graffiti outside a city buildings reads 'KILL COPS'
A number of people are knocked to the ground and at least one man appears to go under the wheels of the car, while onlookers can be heard screaming.
Two people were reportedly taking to hospital following the incident.
The extent of their injuries was not clear, but they were not thought to be threatening.
Speaking to the News Tribune, Haddow said that, after the incident, the officer behind the wheel of the car "stopped at a point of safety" and called for support.
"He was afraid they would break his glass," she said.
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Tacoma Police Chief Mike Ake said: "I am concerned that our department is experiencing another use of deadly force incident.
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"I send my thoughts to anyone who was injured in tonight's event, and am committed to our Department's full cooperation in the independent investigation and to assess the actions of the department's response during the incident."
The officer involved has reportedly been placed on leave and an investigation launched.