A mixed martial arts fighter wrestled an anti-Trump protester to the ground at a flag-waving ceremony after she allegedly attacked another woman.

Tara LaRosa was part of a group of people marching in honor of Veterans Day on an Interstate 84 overpass on Sunday in Portland, Oregon.

The event was organized by members of the Proud Boys, a far-right white nationalist group which was established during the 2016 Presidential election, the Portland Mercurty reported.

An unidentified woman who said she was opposed to Trump became angry with the group and a physical fight ensued between her and LaRosa.

LaRosa, 41, a professional MMA fighter, had earlier posted footage of the group marching before the proceedings took a violent turn.

A mixed martial arts fighter wrestled a Trump protester to the ground after a fight broke out between demonstrators, (pictured). The march was organized by a far-right group called the Proud Boys, and their yellow logo can be seen on the men's pullovers (left)

An unidentified woman, who was protesting against Trump, (pictured), became angry with the group and a physical fight ensued between her and LaRosa, who is seen on top of her

Portland professor unnamed (for now). On the bottom being detained after assaulting another female. On top, woman’s M.M.A Champion and Patriot Tara Larosa uses Jujitsu to Protect people from a crazy communist who attacked the flag wave for veterans, because she thinks the patriots that were there, were racist. Good job protecting patriots, yourself, and the professor until the Portland police showed up. Your a hero Tara!!! 👌👍🇺🇸 I filmed this I have the full version. Contact me if you wish to use. Posted by Press Guard Page on Sunday, 10 November 2019

Footage shows LaRosa lying on the woman as she attempts to restrain her, as LaRosa can be heard telling her to relax.

The woman then says: 'I'm a professor, get off me.' LaRosa is then heard telling her: 'please calm down,' as a man in the background tells the woman: 'You're going to jail, you're not going to be a professor for very long.'

The man can be heard yelling in the background: 'How do you like the Proud Boys now?.'

LaRosa tells her repeatedly to stay calm, as people accuse of her assaulting LaRosa. She then lets her go and the woman sits up against the bridge as she catches her breath.

The woman allegedly bit LaRosa through her jumper and bra during the altercation, leaving bite marks near her breast. LaRosa also had marks on her neck and knees, according to photos posted on one Twitter account.

Portland Police Sgt. Kevin Allen said no arrests were made after they investigated the incident and examined the footage. However he said the case has been referred to the district attorney’s office for review.

He told The Oregonian: 'There are conflicting versions of the events, so we are gathering all of the information we can and referring it to the district attorney.'

Following the incident, LaRosa tweeted that the professor started the fight.

She tweeted: 'The professor started the fight. She tried to engage me in a verbal confrontation, I turned my back ignoring her.

'She then walked farther down the overpass attempting to engage others the same way. I did not see the fight start. I broke the fight up, keeping her from being hurt.'

LaRosa is a New Jersey-born mixed martial artist fighter and her most high-profile successes occurred while competing in BodogFight. She was taking part in a Veteran's Day march on Sunday

LaRosa also posted footage of the same woman as she appears to lunge forward at another demonstrator and said it proved she was the aggressor

The editor of The Post Millenial tweeted pictures showing alleged injuries sustained by LaRosa during the fracas with the anti-Trump protester

LaRosa also posted footage of the same woman as she appears to lunge forward at another demonstrator and said it proved she was the aggressor.

She claims: 'NEW video from yesterday’s altercation at the Veteran’s Day flag wave in Portland, OR over I-84.

'She failed to start a fight w/me, so she chose someone else. In this video she clearly attacks another woman & throws the first punch. I broke up the fight & kept her from being hurt.'

LaRosa had livestreamed the march on her Twitter account, but the video does not show how the altercation between her and the woman began.

She then films herself after the incident and says: ' It's what I'm here for though, I keep people safe. It's what I do, it's a shame it came to this.

'It f*****g sucks, it's not what it's about, it's not why we're out here, it's bullshit. We were standing here and then this woman came up and attacked.

'We had been standing here three minutes, saying a bunch of things, and she attacked one of the women with our group. And I had to put her down, I'm not feeling good about that but it is what it is.'

'I threw no punches, I held her on the ground until police came.'

LaRosa is a New Jersey-born mixed martial artist fighter and her most high-profile successes occurred while competing in BodogFight, where she became the first and only BodogFight Women's Bantamweight Champion