Police in Rome say seven men were injured. Five were British, one Californian and one Bangladeshi.
A group of about 40 or 50 people in motorcycle helmets or with their faces covered were armed and attacked the group of English football fans drinking in Campo de Fiori square. The more seriously injured seems to be the Briton born in 1987. The American was born in 1982.
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A woman hit by police gunfire during a counter-terrorism operation has been arrested after being released from hospital.
Police have been granted extra time to question a man who is being held on suspicion of planning a terror attack.
The man opened fire at the house, shattering the front door and window.