nazi punched
Photos of the suspected Nazi after he was punched were shared online Facebook/Shaughn Patrick Ffud

A suspected neo-Nazi was knocked unconscious in the street in Seattle after he was tracked down when an image of him was shared among anti-fascist groups online.

In a video which has since gone viral, the man wearing a swastika armband was punched in the face by an unidentified male and falls to the ground to cheers of onlookers.

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The incident occurred after an image of the man was posted onto Twitter along with the caption "Nazi s**t head seen on D line headed to downtown Seattle."

The image also claims the man was harassing a black passenger while on the bus.

A second image showing screengrab of a picture posted onto Facebook by user Sean Patrick Duff shows the man lying on the floor along with the caption "just watched a Nazi get knocked the f**k out".

As reported by NY Mag, the time between the two images being posted on social media was less than 90 minutes.

During this time, a text believed to have be shared among anti-facist groups from an unknown individual claiming they had just seen a Nazi in downtown Seattle "screaming in people's faces" adding "so if you know anyone in the area that would like to give him a beating..."

Most of the Twitter users who shared details of the suspected Nazi on Twitter have since have since locked their accounts, including user @teethnclaws who is believed to be the first one to post his image of him on the bus.

Describing the incident to Buzzfeed, @teethnclaws said: "I would say that we successfully identified, tracked and coordinated to neutralize a clear and present danger to Seattle. Whether we coordinated the actual punch or not.

He added: "I, for one, applaud the anonymous hero."

Seattle Police confirmed they received reports of a man wearing a swastika armband and "instigating fights".

In a statement, they added: "Police were on scene in five mins and found him on the ground.

"He declined to provide info about incident & left after removing his armband. No one else at the scene contacted officers to make a report about the incident."