Police in Portland, Oregon, declared a riot Tuesday night, making arrests after rioters smashed windows and threw objects at officers on the one-year anniversary of George Floyd's death, according to authorities. 

A crowd of roughly 200 people – many dressed in black – gathered outside the city's Multnomah County Justice Center. Some lit a dumpster on fire and tagged the justice center with graffiti, while others yelled, "Burn the building down," police said. 

Some in the crowd also threw frozen water bottles and eggs at officers, along with setting metal spikes in the road, Portland police said.

A riot was declared after the mob refused to disperse, marched to City Hall, and broke windows, Fox News reports.