(Portland, OR) -- Police say they've made multiple arrests after a splinter group of agitators broke off from peaceful protesters to clash with police in downtown Portland. The Portland Police Bureau says the agitators gathered near Southwest 4th and Taylor around 9:15 last night and started throwing things at officers while banging on a barricade. Police declared the situation a "civil disturbance and unlawful assembly" and deployed pepper spray and tear gas. The police bureau emphasized that the agitators were acting separately from a larger group of peaceful protesters.