At least 8 arrested in Portland as demonstrators vandalize federal ICE building, Democratic Party state headquarters

(CNN) Demonstrators in Portland, Oregon, on Wednesday vandalized the state Democratic Party headquarters and a federal US Immigration and Customs Enforcement building, according to police.

At least four demonstrations were planned in the city, Sgt. Kevin Allen, spokesman for the Portland Police Bureau, said in a video statement early Thursday.

Two remained peaceful, but the others resulted in "property damage and arrests," he said. CNN is attempting to learn more about who organized the demonstrations.

A group of about 150 people converged on the ICE building in the South Waterfront neighborhood Wednesday evening around 9 p.m., Allen said.

Some demonstrators were carrying pepper ball guns, fireworks, shields, rocks and "electronic control weapons similar to Tasers."

Federal law enforcement officers deployed "crowd control munitions," Allen said, though he did not say what kind, deferring to federal officials. Portland police did not deploy CS gas (commonly referred to as tear gas), Allen added.

Allen said that police were in the surrounding neighborhood and "some arrests were made."

The demonstration at the ICE building followed another earlier in the day, when a crowd of about 150 people gathered at Revolution Hall before marching to the Oregon state Democratic Party headquarters.

Officers on bicycles encountered the protesters in a parking lot at Revolution Hall, where "(d)ozens of people pressed in on the officers and then took one of the officers' bicycles," Portland Police said in a statement . More officers arrived to help and managed to get the bicycle back. The crowd blocked officers' way as they tried to leave.

The group then left Revolution Hall and marched to the Democratic Party headquarters, where some demonstrators "smashed windows and vandalized the building," Allen said.

At one point, the crowd "showed aggression by swarming officers and throwing objects," Allen said.

Another showed the crowd making their way up the street, many of them clad in all black, carrying a sign that read, "We are ungovernable." The station reported the demonstration was billed as a protest against Biden and law enforcement, while supporting the rights of indigenous people.

At least eight people were arrested on various charges, including felony criminal mischief, possession of a destructive device and rioting, Allen said.

"This is not the first time our building has been vandalized during the past year -- none of the prior incidents have deterred us from our important work to elect Democrats up and down the ballot, and this one will be no different," the statement said.

Police in Seattle also reported vandalism to several buildings in its downtown area Wednesday night, including at a federal courthouse.

The department shared photos on Twitter, saying "multiple windows" were shattered at the William Kenzo Nakamura US Courthouse, used primarily by the Ninth Circuit Court of Appeals.

Several arrests were made, police said, including some for property damage and assault. Another man was arrested in connection to a burglary investigation at the Starbucks.