The Corvallis, Oregon, Police Department said in a statement Tuesday afternoon that Marr was taken to the hospital “suffering from a medical event” but that it was “not yet known if the medical event was directly related to the fight.”

Police released few other details, saying that the incident was still under investigation.

Marr has been a fixture of the white supremacist movement in Oregon for years and has used his pickup truck, which he often repaints with different racist messages, to spread hate throughout the area.

In 2009, Marr had a vanity license plate for his truck revoked by Oregon authorities after activists pointed out its antisemitic message: “NO ZOG.” The term “ZOG” is shorthand for the anti-Jewish conspiracy theory of a “Zionist Occupied Government.”

A photograph of the truck at the scene of the fight was published Tuesday by the Corvallis Gazette-Times newspaper. It appeared to show the truck adorned with the logo of the neo-Nazi hate group National Alliance on one side. The words “’Nazi' is just the N-word for White men” were painted on the back above a partial swastika.

Marr is also known for his violent rhetoric, and he has used the pseudonym “Genocide Jimmy” on Twitter.

On Dec. 8, Marr posted a message on Twitter appearing to promote violence in reaction to the murder conviction of neo-Nazi James Alex Fields Jr., who drove his car into a crowd of counterprotesters at 2017’s “Unite the Right” rally, killing one person and injuring several others.

“If, like James Fields, you find your car surrounded by a murderous, anti-White mob do not try to escape, try to maximize your body count because as we have seen, the penalty is going to be the same either way,” Marr wrote.

Police in Corvallis said they had arrested four people on suspicion of being involved in Monday’s fight. Local news reports said the clash may have involved anti-fascist (antifa) activists, but police had not confirmed that.

Correction: This post has been updated to reflect the correct date of Marr's Twitter post.

Photo from Twitter