Italian police have admitted gangs of Napoli's hardcore Ultra fans went out hunting Liverpool supporters to attack in the city last night.
There were a number of incidents ahead of the club's Europa League match at the Stadio San Paolo tonight, which resulted in five English people - two of whom were stabbed - and one Italian being taken to hospital.
Their injuries were not deemed to be serious and all were discharged after receiving treatment but it has prompted police to step up security ahead of the game.
There were three arrests made after the attacks last night and police recovered an array of weapons and Ultra paraphernalia from the home of one.
Among the weapons seized were a baseball bat, several five-foot long aluminium bars with numerous strategically-placed screws protruding and a six-foot wooden plank.
"Ultras went out seeking English fans, absolutely," said Filippo Bonfiglio, head of DIGOS, the local department which deals with terrorism and political activity.
"There are groups of violent supporters here in Naples so we could hypothesise something like this would happen but it was impossible to prevent every attack everywhere."