DENVER — One person was fatally shot in Denver on Saturday against the backdrop of dueling protests, the police said.
Officials would not say whether the shootings were connected to the protests, in which activists with far-right and far-left views organized opposing rallies in Civic Center Park on Saturday.
The police declined to comment further, saying that an investigation was continuing.
The shooting happened near the courtyard of the Denver Art Museum, the Denver Police Department said on Twitter.
A video shows a single shot being fired, a plume of smoke and several police officers rushing to the scene, shouting, “Drop the gun!” A man can be seen lying face down on the sidewalk as officers surround him.
The Denver Post reported that a member of its staff had witnessed the shooting. It said that a man had sprayed mace at another man and that the man who had been sprayed fired a handgun.
Chelsea Jacobs, a member of the Denver Communists, said that Saturday’s event, which the group called a Black Lives Matter-antifa soup drive, had been organized in response to a “Patriot Muster” that the group saw being advertised about a week ago.
The “soup rally” was meant to be ironic in response to comments that far-left protesters throw soup cans, she said.
Ms. Jacobs said that she had been at the north end of the park, where the police had moved the group she was with, and that the shooting had happened at the south end of the park.
Demonstrators from the right-wing group filmed the Denver Communists over a temporary fence that separated the two sides, but the groups did not physically clash, she said.
A tweet promoting the Patriot Muster called for all “patriots” to “Stand up. Show up.”
“It’s time to Roll,” an activist, John Tiegen, wrote on Twitter. “BLM, Antifa, and related Marxist associations are assaulting everything we love and cherish about this country.”
After violence broke out at another event involving opposing groups this summer, businesses near where the protests were being held were warned about the potential for violence this weekend.
It was not the first time opposing groups had clashed over the last few months, as racial unrest and a looming election have ignited protests across the country.
On Aug. 29, a man affiliated with a right-wing group was shot and killed in Portland, Ore., which has had protests against police brutality since early in the summer.