Denver Mayor Michael Hancock has told of his sorrow over "needless, senseless and destructive" scenes as protests continue in the Colorado capital.
“Once again, the violent actions of a few are drowning out legitimate calls for justice. Twice today, we had peaceful, successful demonstration where people expressed their outrage over the death of #GeorgeFloyd," Hancock said.
"We saw them, we heard them, and they respected their cause. Unfortunately, another element with selfish motives and reckless intentions infiltrated tonight’s demonstration and incited violence with homemade explosives, rocks, bottles, graffiti and vandalism.
"This is not who we are, and calmer heads must prevail. Our police officers have a sworn duty to maintain everyone’s safety – and they will. People are crying out to be heard, but this violent distraction only divides us."
Police have deployed pepper balls in the city's downtown area due to "civil disobedience," authorities said.
There have been no reports on the number of arrests or damage in Denver so far.