Rioters clashed with police in downtown Seattle during a demonstration against police brutality, and authorities arrested at least one person, but police said they had no reports of any injuries.
Police responded to the protests near Fourth Avenue and Union Street around 1 p.m.
ET with tear gas, water cannons and rubber bullets, according to police spokeswoman Alicia Trotta.
Trotta said officers used a Taser and pepper spray on protesters and that police had not reported any injuries to officers.
The incident happened after about a dozen people tried to enter the street.
Police also said that they were investigating the possibility that a person had been hit with a rock thrown at them by protesters.
Trottas statement said officers did not have reports of injuries.
It wasn’t immediately clear if protesters were throwing rocks at officers or officers were trying to protect themselves.
Protesters also threw rocks at a police helicopter and then police in riot gear.
Trotzas statement did not say if any injuries were reported.
Several officers, including the helicopter operator, suffered minor injuries, according, to police.
The demonstrations in Seattle and Seattle’s Capitol Hill neighborhood, where rioters had earlier smashed storefronts and clashed with officers, had been peaceful since the day after the death of Michael Brown, an unarmed black teenager.
Protestors had marched on downtown streets, and a police officer shot and killed an alleged arsonist early Saturday.
“This is not a protest against police violence,” Seattle Mayor Ed Murray said on Twitter shortly after the protests began.
“This is about the people.”
Murray said he was concerned that the violence could lead to violence.
Earlier in the day, the National Guard had been deployed to the area to support Seattle police in the city.
Police said they were responding to reports of a person being hit by a rock during the demonstrations, but there was no immediate report of injuries from the incident.
A few hundred protesters gathered in front of the Seattle Police Department headquarters to show their support for the protests, according a statement by the Seattle Times.
Protester and former Black Panther leader and Seattle activist Sami Ojala said in a video posted online that police should have been able to arrest the protesters for attacking officers.
The protesters were chanting “F–k the police,” a reference to the nickname the Black Lives Matter movement is known for.
Protesters said they wanted to see more of the Black Panther movement, which was born in New York City in 1968 and has since expanded into cities including Baltimore, Cleveland, Detroit and Oakland, California.
In recent months, Black Lives Matters protesters have staged sit-ins and shut down businesses in many cities across the country.
Protesting police violence has been a hot topic this year after the killing of a black teenager in the Louisiana city of Baton Rouge last year.
In August, a police body camera video showed a white officer firing a fatal shot at a black teen during a confrontation, which prompted protests in several cities.