UEFA officials will investigate the trouble that broke out during and after the Champions League qualifying match between Lazio and Dinamo Bucharest.
Five Dinamo supporters were injured in clashes with Lazio fans and one remains in hospital after being stabbed. Inside the ground, Lazio supporters chanted racist slogans during Tuesday’s 1-1 first leg draw.
“We have to await the referee and observer reports before deciding whether to launch any disciplinary action but we are looking into what went on at Lazio,” a UEFA spokesman said.
“If the violence happened outside of the ground then unfortunately that is a matter for the police and authorities in Italy.
“But we had concerns about racism before the game and if that is the case, then as you know we take a zero tolerance approach on racism.”
Earlier this month UEFA threatened clubs with expulsion from its competitions and referees were ordered to stop matches immediately if there was any racist or violent behaviour on the pitch or in the stands.
Lazio have been punished by UEFA on three previous occasions following violent and racist behaviour.
“There is no doubt that there is a violent history surrounding Lazio fans and we always seem to have problems. In fact there was a question mark hanging over their stadium before this game,” the UEFA spokesman said.
“But UEFA can not deal with this alone, it is a wider, social problem across many countries which needs to be tackled in a very tough way by all the authorities.”