4 Injured, 5 Arrested in Football Riots Aboard Italian Train

Government and sports officials reacted with outrage Monday after the opening weekend of the Italian football season was marred by Napoli fans rioting on a train to Rome.

A group of several hundred Napoli supporters launched firecrackers, broke windows, slashed seats open and caused $730,000 worth of damage to the train Sunday, Italian media reported. Rome's transport agency said some of its buses were also vandalized, causing $88,000 in damage.

At least four railway workers were injured, reports said, and more violence erupted when the train reached Rome for the AS Roma-Napoli game, which ended 1-1. Rome police reported five arrests near the stadium.

Italian football federation president Giancarlo Abete called for serious measures "against these delinquents who ruin the image of football on a national and international level. ... Football is not represented by these people."

Napoli fans may be barred from away games for the rest of the season.