Inter Milan vice-president Javier Zanetti says Italian football must get a handle on fans violence.

It's been confirmed a paper bomb was thrown by Juventus fans into Torino rivals on Sunday, injuring 11 people.

"I'm sorry to see these things happen, it's bad for Italian football," Zanetti said.

"Things need to change, it can't go on like this. It's hard to see things like this, hurting all the youngsters and families who want to enjoy a nice Sunday at the stadium."