Several hundred protesters gathered outside the ICE facility Saturday afternoon and evening. Portland police declared it a riot.

In Portland, hundreds of demonstrators began assembling outside the Oregon Convention Center around 10 a.m. The crowd grew steadily, with many participants waving flags, banners and signs decrying the president and Immigration and Customs Enforcement.

Federal officers in tactical gear are clashing with demonstrators and deploying smoke, tear gas and flash grenades, the Oregonian reports.