Police in Rome arrested three more people on Wednesday for offences relating to the attack on Tottenham fans before a Europa League match in November.
As the London club prepared to face Lazio earlier this season, a gang of around forty people - wearing masks to hide their identity - attacked a group of Tottenham fans at The Drunken Ship pub.
The incident left Spurs supporter Ashley Mills in hospital with a severed artery, and a number of men - identified as Roma fans - were arrested and charged.
It was widely believed the attack was not football-related and instead linked to a march of far-right activists in the Italian capital that same week.
Fulvio Marra, Tony Vratuli and Nicolae Rotariu have now all been taken into custody and will be charged with GBH and criminal damage. Two are believed to be Lazio 'ultras', with the other thought to support Lazio.
Police also explained that they now have evidence the attackers had organised themselves into two groups, which then approached the pub in different directions in order to maximise the damage caused.
Those involved have also received five-year bans from football stadia in Italy.