The attack on Tottenham supporters happened at Rome's Drunken Ship pub.
Bar co-owner Gabriele Cianella said the attackers had thrown pieces of iron at the windows and were wearing knuckle dusters.
I think this is the first time that something so bad has happened. We have had other incidents like this but this is the worst.
If you throw stones and knuckle dusters I think you want to hurt someone. There was a lot of blood inside on the floor.
Now we also have some blood on the windows. They came here to hurt someone.
More top news
The family of a father-of-three from East Ham have made a fresh appeal to catch his killer 20 years after he was murdered.
The Metropolitan Police has paid £45,000 in damages in an out-of-court settlement following the 'unlawful arrest' of a black motorist.
John Cantlie, who worked for a number of Fleet Street newspapers, is thought to have been taken hostage in November 2012.