Police investigating “despicable disorder” at a football derby have released a video of suspects destroying a toilet block.
More than 150 officers were deployed to the stadium and 11 people arrested.
Police said “a large section” of Stoke fans had been disruptive.
Port Vale won the match 4-0 and the crowd of 7,940 was made up of almost 4,000 Stoke fans.
Staffordshire Police called the video “shocking” and appealed for information on the identity of the men.
Det Ch Insp Rob Taylor said: “We have a duty to the local community and the loyal supporters of both clubs to act swiftly.
“We will ensure that all opportunities will be taken to identify those suspected of being involved in this despicable disorder and bring them to justice.”
Previously, Ch Supt Wayne Jones said his officers faced “shocking levels of hostility” on the night.
“The toilet block in the away stand was damaged badly,” he said. “The cisterns and urinals were smashed off the wall, windows were damaged and there was an attempt to set fire to the toilet block.”
It comes after two men were charged with using threatening or abusive language.
Six other men were released pending further inquiries.