Two Spaniards, one Brit and one American reportedly stabbed ahead of Lazio-Seville game in Rome on 14 February.
Four people have been stabbed in the central Rome district of Monti in an outbreak of football-related violence, according to Italy's Gazzetto dello Sport.
Two Spaniards, one Brit and one American have been reported stabbed, with one of the Spaniards in a serious condition.
The violence comes ahead of a Europa League match between Lazio and Seville at Rome's Stadio Olimpico on 14 February.
Italian newspaper La Repubblica reports that the stabbings occurred after clashes involving around 40 people at the intersection of Via dei Serpenti and Via dei Leonina, at 21.30 on 13 February.
A small group of Seville supporters reportedly bore the brunt of the violence, with reports of Lazio supporters then giving chase to Spanish fans who took refuge in surrounding restaurants.
Photo La Repubblica
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Rome football violence in Monti, four stabbed
Via Leonina, 00184 Roma RM, Italy