An Under-21s game in England ended with “considerable damage” caused to a football ground – including seats being ripped out, windows smashed and toilets broken.
More than 150 officers were deployed to the Checkatrade Trophy match between fierce Staffordshire rivals Port Vale and Stoke at Vale Park on Tuesday night.
Staffordshire Police said 11 arrests had been made for violence and public order offences after disruptive behaviour from large sections of the away fans.
Chief Superintendent Wayne Jones, commander for the policing operation, said: “I would like to express my thanks to all the officers that helped us deliver a challenging policing operation. There was some despicable behaviour by a large number of fans, which has caused considerable damage to the away section of Vale Park.
“We are taking this very seriously and I expect there to be more arrests in the coming days as we examine CCTV coverage and gather evidence of the crimes committed.
“My officers have shown bravery and dedication tonight and the support from stewards and partners has been first class in ensuring that those intent on fighting each other were unable to do so.
“I am also grateful for local pubs working with us and shutting early to ensure the safety of those in Burslem.”
Mr Jones added: “This kind of behaviour is not acceptable and I would like to reassure you that we will do all we can to bring those responsible to justice.”
Port Vale won the match 4-0.