Heavily armed police officers waiting in Court 1 for alleged gang leader Elton Lenting, 41, alias Koffi, and 19 other gang members were alerted by correctional officers about the brawl.
The police rushed down and rescued Lenting and Raymond Arendse, alias Muis, 32. Both sustained head injuries.
The defence lawyers for the accused complained to Judge Andre le Grange that no trial date had been set down.
The accused have been in jail for the past two years.