VIDEO: Man identified as white nationalist punches woman in face at Berkeley Trump rally

BERKELEY, Calif. -- A white nationalist who attends Cal State Stanislaus is under investigation by the university Tuesday after video surfaced showing him punching a woman.

RELATED: Minimal damage downtown after Berkeley Trump protest clash

School officials say they have zero tolerance for violence. The man in the video has been identified as Nathan Damigo, a former Marine who has served time for armed robbery and formed a white nationalist group.

He was not one of the 20 people arrested at the dueling pro and anti-Trump events.

1 of 14

Protesters are seen gathering in Berkeley, California to demonstrate for and against President Donald Trump on Saturday, April 15, 2017.

KGO-TV

Click here for more stories, photos, and video on President Donald Trump.