Avon and Somerset Police say they have arrested around a dozen "known hooligans" following violence atthe Bristol football derby.
Chief Superintendent Caroline Peters criticised a "small minority of hooligans" for coming to the match "with the sole intention of trying to spoil the enjoyment for the majority".
Three police officer were treated for non-serious injuries, she said.
More top news
Is another prediction from the Back To The Future universe about to come true?
To the undoubted tragedy that was the killing of Reeva Steenkamp, the South Africa judicial system has added layers of legal soap opera.
Cathryn Hall is campaigning for police widows' pensions to be payable for life even if they form a new partnership or remarry.