Just before midnight, police in Portland, Oregon, began dispersing protesters assembling near the county’s Justice Center after declaring βa civil disturbance and unlawful assembly.β Portland police Lt. Tina Jones said on Twitter that a firework had been lobbed over the fence at the Justice Center, injuring a Multnomah County deputy. She says police were making arrests. In a video posted on Twitter by a Portland Tribune reporter, a voice from a loudspeaker could be heard ordering demonstrators to leave the area βor you will be subject to use of force and arrest.β In other videos, popping noises could be heard as whiffs of smoke wafted and a police officer is seen momentarily clashing with a protester.