In the early hours of Sunday, May 29, security cameras captured a violent, bloody brawl at the City Nightclub in Adelaide between 25 members and associates from the Hells Angels and Finks bikie gangs.

Last Friday morning, police conducted dawn raids on several properties, arresting 12 men over the brawl and charging them with aggravated riot.

Today, SA Police announced the arrests of a further four men in relation to the brawl, one being a member of the Finks and the other three being associates of the Hells Angels.

The four men have been released on strict bail conditions.

Police say they are still investigating the brawl.

"We will continue our investigation into this matter and will not stop until every avenue of inquiry has been exhausted," Detective Inspector Steve Taylor from Crime Gangs Task Force said.

"Violent bikie behaviour will not be tolerated."