Five away fans were arrested for disorder after trouble flared when Sheffield United hosted Preston North End.
Police in Preston North End tweeted following the Blades' 1-0 home defeat: "Just back from Sheffield unfortunately five #pnefc 'fans' let themselves and the club down. They’ll be remaining over in Sheffield having been arrested for disorder."
A photo shared on Twitter shows someone being tended to outside the ground after fans had reportedly clashed.
The Star has contacted South Yorkshire Police for more information.