Police in Portland, Oregon, have advised groups protesting in their city to disperse after things got unruly on the streets Saturday afternoon. Protests and counterdemonstrations were taking place at three different locations.

Portland police said the scenes had become a "civil disturbance and unlawful assembly," and asked all folks in the area to leave immediately.

Oregon's largest city was calm and quiet Sunday after a day of chaotic, competing protests that clogged Portland streets, crippled public transit and left at least eight people injured.

Police in riot gear broke up the demonstrations as clashes developed among law enforcers, anti-fascist "antifa" protesters and right-wing groups. Three people were charged with crimes ranging from assault on a police officer to harassment, police said.

Andy Ngo, a photojournalist and editor at Quillette, landed in the emergency room after a mob of antifa activists attacked him on the streets of Portland during a Saturday afternoon demonstration.

The assailants wore black clothing and masks, and were engaged in a counter-protest against several right-wing groups, including the Proud Boys. Ngo is a well-known chronicler of antifa activity, and has criticized their illiberal tactics on Fox News. He attended the protest in this capacity—as a journalist, covering a notable public event.