A vigil for George Floyd, the man killed by Minneapolis police, descended into violence on Friday night in Portland, Oregon. The protesters targeted the Multnomah County Justice Center, which houses the sheriff’s office and detention center in Portland. In videos posted to social media, protesters are seen breaking windows and setting fires inside the building. One clip shows a group of protesters smashing computers and overturning desks and furniture, RT reported.

Protesters can be heard shouting “burn that s**t down” as flames rise from the building’s windows.

Portland Police have declared the protest a riot and warned all demonstrators to vacate the area or be subject to “gas, projectiles, and other means necessary for dispersal.”

Riots and protests have sprung up in cities across the United States. The Pentagon is reportedly preparing to send military police to Minneapolis, while several states have already mobilized their national guards.