by Christin Ayers

BERKELEY (KPIX) — In the wake of Saturday’s protest violence in Berkeley, videos and photos of the brawls that broke out have been circulating online

2-Frames from "Sucker Punch" Video

Two images from a video showing a woman being punched during Saturday’s “Patriots Day” protest in downtown Berkeley. (via WeAreChange.org)

One clip, in particular, is sparking outrage at a known white supremacist, a student at California State University, Stanislaus.

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Of all the fist-fights, explosions and bloody brawls that broke out at Saturday’s so-called “Patriots Day” protest in downtown Berkeley, one moment stood out.

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In a video posted to social media, a young woman — apparently protesting Pres. Trump — is seen being sucker-punched.

Reverse-Angle of Woman Punched at Protest

Reverse-angle photo showing woman punched at the protest

A reverse-angle picture shows her own fist extended as well. The video and image have gone viral — not least because the man throwing the punch is Nathan Damigo, founder of the white supremacist organization known as “Identity Europa.”

KPIX attempted to make contact with the woman, who goes by the name Louise Rosealma. A fundraising page for her says that, since the protest, she has received rape and murder threats online. It’s unclear whether Berkeley police are investigating the incident or Nathan Damigo.

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We attempted to reach Damigo for comment but he has not replied.