POLICE have warned fans that there will be no tolerence to violence at this weekend's South Yorkshire derby.
Barnsley make the short journey to Bramall Lane to face Sheffield United on Saturday afternoon - the first league meeting of the sides since April 2011.
The game is expected to attract more than 20,000 supporters and there will be a visible policing presence around the ground and in the city centre.
Extra officers will be on duty for the League One clash.
Superintendent Scott Green, who is overseeing the policing of the match, said: "I will ensure we provide a welcoming environment for fans who want to attend and enjoy the game.
"However, we will not tolerate any level of disorder or violence within South Yorkshire and we have sufficient resources in place to deal with those intent on causing trouble."