Fans arrested at Port Vale v Wolves football match bailed
All 23 football fans arrested on Saturday before, during and after a local derby match have been bailed.
Police were pelted with missiles when a disturbance broke out following Saturday's League One fixture between Port Vale and Wolverhampton Wanderers.
About "two-thirds" of those arrested are thought to be people who "associate themselves" with Port Vale, with others believed to be Wolves followers.
Trouble spilled into Burslem town centre after the final whistle.
Staffordshire Police said: "A detailed investigation is under way into the offences committed and evidence will be put before the courts in relation to the criminal behaviour of those who decided to become involved."Searching CCTV
Officers were pelted with bottles and missiles and a police car smashed up after fans spilled into Burslem town centre in Stoke-on-Trent after the match had finished at Vale Park.
Police said a "minority of fans" confronted each other after the game and officers were "confronted by a significant group" of "violent" Port Vale fans.
Two adults suffered dog bites from police dog units and were treated by paramedics, according to the force.
Those arrested included nine people detained before kick-off. Another four were arrested during the match for offences including going on to the pitch and setting off flares.
Police said fans from both sides had been involved but praised a group of Wolves fans who "co-operated with police by waiting in the away coach park while police worked to clear the area".
Port Vale lost the game 3-1 to visiting Midlands rivals Wolves.
Police said they were looking at CCTV footage from the day's fixture, in a bid to trace everybody who had a hand in causing trouble.