Antifa Trends on Twitter After Video Shows Protest Group Throwing Milkshakes at Journalist

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.

Those advertised to be among the demonstrators Saturday included two right-wing groups — the street-fighting fraternal group called Proud Boys, and Haley Adams of the "HimToo Movement." The Rose City Antifa planned a counterdemonstration.

The trend on Twitter hit fever pitch Saturday afternoon — nearly 50,000 before 3:30 p.m. PT.