Police are investigating after video emerged of an apparent brawl between security guards and attendees at annual car festival Summernats.

The incident occurred during one of the festival events at Exhibition Park in Canberra (EPIC) on Saturday.

In one of the videos which have been heavily circulated on social media, two men appear to be arguing with a large group of people wearing hi-vis vests with the words “crowd safety” on the back.

One of the men is punched in the face by a man in a vest, leading to further punches being thrown at members of the public.

In another video, one of the men in hi-vis is physically restrained by others and can be heard saying to someone off camera, “I’ll kill you”.

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Police said they are investigating what occurred and so far have not made any arrests.

Two arrests were made at EPIC on Saturday over separate incidents of alleged anti-social behaviour

Police also responded to a handful of hoon driving incidents after the event had concluded.

Numerous defect notices were issued and three vehicles were seized as a result of “hoon driving behaviour”, police said in a statement.

“ACT Policing reminds drivers that hoon driving that endangers other road users will continue to be targeted,” the statement said.

About 120,000 people were expected to attend the four-day festival, which includes lawn mower racing, a mullet haircut competition, sanctioned burnouts and performances from Daryl Braithwaite and Grinspoon.

While the event brings in tens of millions of dollars for the local economy with 85 per cent of attendees being from interstate, some locals complain of burnout smoke and loud revving late at night.

Summernats organisers have been contacted for comment.

-AAP