Police are investigating an alleged incident that occurred in the tunnel after Barnsley's 4-2 League One win over Fleetwood Town on Saturday.
A tweet from Barnsley striker Cauley Woodrow, which has since been deleted, suggested Fleetwood boss Joey Barton confronted opposite number Daniel Stendel.
He said in a post on social media: "Firstly @ftfc to have a manager that can physically assault another manager in the tunnel is disgusting, causing our manager to have blood pouring from his face!!
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"People like you don’t deserve a place in the game of football you are foul.