A riot was declared in Portland Sunday evening as officers tried to quell another night of unrest that saw protesters march on a police union building, throw objects at officers, block a road and set dumpster fires, according to multiple reports.

Roughly 200 people marched from Kenton Park to the Portland Police Association building just before 10 p.m., which was the site of another protest on Saturday.

When protesters arrived outside the building, police warned them not to participate in criminal activities.

Do not engage in criminal activities such as vandalism or attempt to set the building on fire," police said.

Protesters would later move towards a local park before dozens returned to the police union building and authorities ordered those gathered to leave.

Three officers were hurt, including two who were taken to a hospital, during the efforts to clear the crowd of several hundred people outside the union building late Saturday.

Nine people were arrested during the protest, police said in a statement!

The Portland Police Association building is located about five miles north of the federal courthouse