Posts from Antifa groups prior to the event encouraged them to infiltrate it undercover.
"On Nov. 4 don't forget to disguise yourselves as patriots/Trump supporters," said a social media reminder from one Antifa chapter, according to the Village News.
"Wear MAGA hats. USA flags," it continued.
"A convincing police uniform is even better. This way police and patriots responding to US won't know who their enemies are and onlookers and the media will think there are Trump supporters rioting so it's harder to turn popular opinion against us."