U.S. federal agents fired tear gas at protesters gathered outside the federal courthouse in Portland, Oregon, late Wednesday.
Mayor Ted Wheeler was among those standing by a fence in front of the courthouse when the agents fired the tear gas.
Protesters have demonstrated in Portland for 56 consecutive days, rallying against police violence, racial inequality and the recent deployment of the federal forces in the city.
The mayor arrived at the protest area earlier in the day and pledged his solidarity with the crowd, but his presence was largely rejected as many yelled at him.
Critics have faulted Wheeler for not controlling the city’s police force, which threatened its own use of force with tear gas and arrests Wednesday night as Portland police declared the gathering a riot. Others, including business owners who have seen their operations disrupted by the protests say Wheeler has failed to bring the situation under control.
Also Wednesday, the Oregon attorney general filed a lawsuit accusing the federal agents of arresting protesters without cause and using excessive force, which federal authorities have disputed.