In Seattle, police said they had arrested at least three members of a group who smashed windows, tagged buildings with graffiti and burned a U.S. flag.
In Portland, hundreds of violent Antifa rioters took to the streets to protest Biden's inauguration, with some vandalizing the Oregon Democratic Party headquarters, smashing windows, graffitiing the walls, and lighting dumpsters on fire. Some demonstrators carried a sign reading, "We don't want Biden, we want revenge!" in response to "police murders" and "imperialist wars".
Police officers arrested eight adults in total, on charges ranging from rioting and possession of a destructive device to reckless burning.
State capitols across the country were already on high alert on Wednesday for President Biden's inauguration.More news: Djokovic Says Demands For Australian Open Players 'Misconstrued'
A crowd of about 150 people gathered at Revolution Hall, a music venue in southeast Portland, and marched to the headquarters of the Democratic Party of OR on Wednesday afternoon.
Authorities were able to arrest eight people in connection to the damage and seize an array of weapons, including molotov cocktails, chemical spray and a crow bar.
Around 150 people vandalised Oregon's Democratic Party offices Wednesday afternoon, before a similarly sized group descended on the federal Immigration and Customs Enforcement building in Portland late evening.
Some demonstrators were carrying pepper ball guns, fireworks, shields, rocks and "electronic control weapons similar to Tasers". Many were also wearing helmets and gas masks, police said.More news: The supermodel shares sweet snap with baby daughter and says she's 'obsessed'
Within minutes of arriving at the ICE facility, some people began throwing rocks and eggs at the building while others applied graffiti.
The protesters rallied against the police, decrying the deaths of unarmed Black men at the hands of law enforcement, according to a local Fox television affiliate.
At least four demonstrations were planned in the city on Wednesday, Sgt. Kevin Allen, spokesman for the Portland Police Bureau said in a video statement early Thursday morning.
"As always, we appreciate those who made your voices heard without resorting to criminal activity", Allen added.More news: Tiger Woods to undergo surgery, will miss two tournaments
"Please, if you are exercising your free speech rights, do so peacefully".