Barton is said to have confronted Reds boss Daniel Stendel in the tunnel following Saturday’s game, which ended in a 4-2 victory for the home side at Oakwell, and South Yorkshire Police are investigating.
Harvey told BBC Radio 5 Live: “As an off-the-field matter the tunnel is still in the domain of the referee but we will work closely with everybody to ensure it’s not a case of who deals with the matter but actually the matter is dealt with properly.
“The police investigation is ongoing so we need to leave the details for them to deal with.”
A South Yorkshire Police spokesman said: “We are aware of something that has taken place in the tunnel after the game and we are investigating.”