Police said hundreds of people gathered at the federal courthouse Saturday night to protest and hear speeches before marching through downtown. That march was peaceful, police said.
Separately, a few miles east, a group of about 200 people marched from Laurelhurst Park to the Penumbra Kelly Building, and they blocked traffic, directed lasers at officers and threw glass bottles at them, according to Portland Police.
One person in the crowd threw a glass jar or bottle filled with paint, which hit an officer in the head, police said. The officer was not injured.
Police said people with "press" written on their outer garments were among those throwing objects at officers. Portland Police made two arrests throughout the night, according to the statement, and did not use tear gas.
CNN's Josh Campbell contributed to this report.