Football Association officials are to study video footage of alleged racist chanting by a group of Sheffield United supporters during their Yorkshire derby against Bradford.
It has been claimed a small section of United fans in The Kop sung ‘You’re just a town full of ISIS’ to Bradford City supporters during Monday’s game.
The Blades announced they had launched an investigation into allegations of ‘inappropriate behaviour’ and the FA has now confirmed it will now be looking into the matter too.
The FA said it would ask both clubs for their observations on the matter and study video footage before deciding if punishment was necessary.
United are also understood to have taken steps to identify the alleged offenders.
Anyone who is deemed to have taken part in the chanting could face criminal proceedings.
United, who are currently eighth in League One, issued the following statement on Wednesday: “The club has received complaints about both sets of fans from the fixture - including a number of contradictory reports.
“The Blades will take every step to track down and deal with those responsible for any inappropriate actions, which ruin the match-day experience for other supporters.
“Sheffield United is an inclusive family and community orientated club where everyone is made to feel welcome and it endeavours to improve on this principle year on year.”
Blades season ticket holder Ramon Mohamed, from Totley, said he had been ‘disgusted’ to hear the chants from a ‘few hundred’ fans.
Mr Mohamed said: “It’s like a return to the Dark Ages.”
United striker Billy Sharp claimed a number of Bradford fans threw coins at him during the match.