Police used rubber bullets, pepper spray and flash bang devices to disperse the protesters who became violent.
[9] Members of the protest who opposed the violence intervened when a man tried to destroy a piece of electrical equipment with a bat.
Authorities also closed local stretches of Interstate 5 (I-5) and I-84 as a precaution, and warned motorists to watch for people in roadways.
Police used flash bangs to disperse crowds until nearly midnight, including one group in front of City Hall.
[4] In reaction to the ongoing disturbances, police closed Pioneer Courthouse Square and a two-block perimeter around the park, and warned that anyone who remained would face arrest.
[8][9] By the fourth day of the riots, Portland police chief Mike Marshman estimated that damages exceeded $1 million.
[15] Police used postings on social media to track down vandals with numerous arrests made in the days following the riots.