Five people sought in connection with an assault in March have now been identified.
A 31-year-old man suffered serious facial injuries when he was attacked near the Railway Bell pub in Surrey Street around 10.45pm on Friday, 3 March.
An appeal was issued to locate five men thought to be able to help with the investigation.
Two 19-year-old men and a 21-year-old man, all from Brighton, have been arrested on suspicion of causing grievous bodily harm and released on conditional bail while the enquiries continue.
Two other men have been invited to attend a voluntary interview.
A 44-year-old man from Brighton arrested on 31 July on suspicion of causing grievous bodily harm remains on conditional bail.