A total of 16 men, from Oxford and Banbury, have now been arrested after a mass brawl in Gloucester Green.
The suspects, aged between 18 and 27, were arrested on suspicion of violent disorder after the incident at about 4.20am on Saturday. One man suffered serious facial injuries in the fight.
The men have been released to answer bail on dates from November 21 to December 10.
Police are appealing for witnesses to call them on 101, or the anonymous Crimestoppers charity on 0800 555111.
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