A throng of violent protesters set a dumpster alight and hurled rocks at federal agents outside an Immigration and Customs Enforcement building in Portland, Ore. according to police and video of the chaotic scene.
Footage of the unrest shows a dumpster ablaze outside a boarded-up ICE building, where a team of Federal Protective Service agents in riot gear responded at about 10:30 pm Wednesday after it was pushed in front of the building.
Federal officers responded with tear gas and pepper-ball rounds as police advanced on the demonstrators.
At one point, a large explosion occurs near the dumpster, apparently caused by fireworks.

Portland cops responded to the scene a short time later along with firefighters to extinguish the burning dumpster, police spokeswoman Officer Melissa Newhard said.
The protesters, who are not seen in the footage, were throwing rocks at the federal agents.
No injuries were reported to cops, but one person was arrested at the scene. Karl Nilsson, was charged with attempted assault on a public safety officer, disorderly conduct and riot.