South Yorkshire police have arrested a man on suspicion of a racially aggravated public order offence and racially aggravated assault.
The arrest relates to an incident at Oakwell, home of Barnsley, on Saturday 13 April.
Police say the man attended a police station and was arrested on Wednesday 17 April. He remains in police custody for questioning, adding “We would ask members of the media and the public to refrain from speculation in relation to this incident as it could potentially harm the investigation.”
On Saturday the League One side hosted Fleetwood Town, winning 4-2 to move back into the promotion places.
Barnsley subsequently revealed they had lodged a complaint to the EFL and FA following a tunnel incident.
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“Barnsley Football Club can confirm that it has lodged a formal complaint to both the English Football League and the Football Association,” said a club statement. “This is following an alleged incident at the conclusion of the match on Saturday 13th April, between Joey Barton and Daniel Stendel.
“The club is also currently working with the police and assisting with all enquiries regarding the incident. No further comment will be issued whilst police investigations are ongoing.”
Police said enquires are ongoing, but had earlier appealed for witnesses for an incident they believed occurred in the tunnel at around 5pm.
“Officers are particularly keen to speak to anyone who may have caught the incident on camera or who may have any mobile phone footage immediately before or after the incident occurred,” a police statement said.