Twelve people were arrested and two cars were impounded after protesters blocked I-5 in Seattle on Monday afternoon, Washington State Patrol said.
The incident began around 12:30 p.m. near James Street. The group got onto the freeway and blocked the collector-distributor lanes near downtown.
State patrol quickly responded, and arrested 12 people, Trooper Rick Johnson said. Two cars were also impounded.
The roadway is now clear.